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papers

Publications (69)

cond-mat.str-el2010

The effective fine structure constant of freestanding graphene measured in graphite

James P. Reed, Bruno Uchoa, Young Il Joe +4

Electrons in graphene behave like Dirac fermions, permitting phenomena from high energy physics to be studied in a solid state setting. A key question is whether or not these Fermi…

cond-mat.supr-con2021

Generic character of charge and spin density waves in superconducting cuprates

Sangjun Lee, Edwin W. Huang, Thomas A. Johnson +19

Understanding the nature of charge density waves (CDW) in cuprate superconductors has been complicated by material specific differences. A striking example is the opposite doping d…

cond-mat.str-el2012

Crystallographic refinement of collective excitations using standing wave inelastic x-ray scattering

Yu Gan, Anshul Kogar, Peter Abbamonte

We propose a method for realizing true, real-space imaging of charge dynamics in a periodic system, with angstrom spatial resolution and attosecond time resolution. In this method,…

cond-mat.mtrl-sci2025

Topology-Driven Vibrations in a Chiral Polar Vortex Lattice

Eric R. Hoglund, Harrison A. Walker, Peter Meisenheimer +13

The ordering of magnetic or electric dipoles leading to real-space topological structures is at the forefront of materials research as their quantum mechanical nature often lends i…

cond-mat.str-el2007

Electronic reconstruction at SrMnO3-LaMnO3 superlattice interfaces

Serban Smadici, Peter Abbamonte, Anand Bhattacharya +5

We use resonant soft x-ray scattering to study electronic reconstruction at the interface between the Mott insulator LaMnO3 and the "band" insulator SrMnO3. Superlattices of these…

cond-mat.mtrl-sci2017

The importance of sigma bonding electrons for the accurate description of electron correlation in graphene

Huihuo Zheng, Yu Gan, Peter Abbamonte +1

Electron correlation in graphene is unique because of the interplay of the Dirac cone dispersion of $I ¨ $ electrons with long range Coulomb interaction. The random phase approximati…

cond-mat.str-el2021

Observation of orbital order in the Van der Waals material 1T-TiSe2

Yingying Peng, Xuefei Guo, Qian Xiao +11

Besides magnetic and charge order, regular arrangements of orbital occupation constitute a fundamental order parameter of condensed matter physics. Even though orbital order is dif…

cond-mat.supr-con2021

Doping-dependence of the electron-phonon coupling in two families of bilayer superconducting cuprates

Yingying Peng, Leonardo Martinelli, Qizhi Li +21

While electron-phonon coupling (EPC) is crucial for Cooper pairing in conventional superconductors, its role in high- $T_{c}$ superconducting cuprates is debated. Using resonant inela…

cond-mat.supr-con2022

Two-electron photoemission spectroscopy in Topological Superconductors

Ka Ho Wong, Ameya Patwardhan, Peter Abbamonte +2

We demonstrate that the photo-electron counting rate, $P^{(2)}$ , measured in two electron coincidence spectroscopy (2 $e$ -ARPES) experiments, provides unprecedented insight into the…

cond-mat.str-el2016

A reexamination of the effective fine structure constant of graphene, as measured in graphite

Yu Gan, Gilberto de la Pena Munoz, Anshul Kogar +5

We present a refined and improved study of the influence of screening on the effective fine structure constant of graphene, $I^\pm^{*}$ , as measured in graphite using inelastic x-ray sc…

cond-mat.str-el2006

Absence of long-ranged charge order in $N a_{x} C a_{2 - x} Cu O_{2} C l_{2}$ at x=0.08

Åerban Smadici, Peter Abbamonte, Munetaka Taguchi +5

A periodic $4 a \times 4 a$ density of states (DOS) modulation (a "checkerboard pattern") was observed with STM in $N a_{x} C a_{2 - x} Cu O_{2} C l_{2}$ (NCCOC) [T. Hanaguri \emph{et al.}, N…

cond-mat.str-el2014

Temperature-resolution anomalies in the reconstruction of time dynamics from energy-loss experiments

Anshul Kogar, Sean Vig, Yu Gan +1

Inelastic scattering techniques provide a powerful approach to studying electron and nuclear dynamics, via reconstruction of a propagator that quantifies the time evolution of a sy…

cond-mat.str-el2013

First-principles method of propagation of tightly bound excitons: exciton band structure of LiF and verification with inelastic x-ray scattering

Chi-Cheng Lee, Xiaoqian M. Chen, Yu Gan +4

We propose a simple first-principles method to describe propagation of tightly bound excitons. By viewing the exciton as a composite object (an effective Frenkel exciton in Wannier…

cond-mat.str-el2022

Absence of precursor incommensurate charge order in electronic nematic Ba0.35Sr0.65Ni2As2

John Collini, Sangjun Lee, Stella X. -L. Sun +5

Recent discoveries of charge order and electronic nematic order in the iron-based superconductors and cuprates have pointed towards the possibility of nematic and charge fluctuatio…

cond-mat.str-el2026

Reexamining the strange metal charge response with transmission inelastic electron scattering

Niels de Vries, Eric Hoglund, Dipanjan Chaudhuri +8

The strange metal remains one of the great unsolved problems for 21st century science. Since the early development of the marginal Fermi liquid phenomenology, it has been clear tha…

cond-mat.str-el2024

Collective charge excitations studied by electron energy-loss spectroscopy

Peter Abbamonte, JÃ¶rg Fink

The dynamic charge susceptibility, $I ¨ (q, I ¨ )$ , is a fundamental observable of all materials, in one, two, and three dimensions, quantifying the collective charge modes, the ability…

cond-mat.str-el2014

The effect of electron correlation on the electronic structure and spin-lattice coupling of the high-T $_{c}$ cuprates: quantum Monte Carlo calculations

Lucas K. Wagner, Peter Abbamonte

Electron correlation effects are particularly strong in the high temperature superconducting materials. Devising an accurate description of these materials has long been a challeng…

cond-mat.str-el2022

Anharmonic multiphonon origin of the valence plasmon in SrTi1-xNbxO3

Caitlin S. Kengle, Samantha I. Rubeck, Melinda Rak +10

Doped SrTi1-xNbxO3 exhibits superconductivity and a mid-infrared optical response reminiscent of copper-oxide superconductors. Strangely, its plasma frequency, omega_p, increases b…

cond-mat.str-el2021

Kramers-Weyl fermions in the chiral charge density wave material (TaSe $_{4}$ ) $_{2}$ I

Soyeun Kim, Robert C. McKay, Nina Bielinski +11

The quasi-one-dimensional chiral charge density wave (CDW) material (TaSe $_{4}$ ) $_{2}$ I has been recently predicted to host Kramers-Weyl (KW) fermions which should exist in the vicinit…

cond-mat.str-el2021

Multiple charge density waves and superconductivity nucleation at antiphase domain walls in the nematic pnictide Ba $_{1 - x}$ Sr $_{x}$ Ni $_{2}$ As $_{2}$

Sangjun Lee, John Collini, Stella X. -L. Sun +6

How superconductivity interacts with charge or nematic order is one of the great unresolved issues at the center of research in quantum materials. Ba $_{1 - x}$ Sr $_{x}$ Ni $_{2}$ As$_{2}…

cond-mat.supr-con2021

Distinguishing finite momentum superconducting pairing states with two-electron photoemission spectroscopy

Fahad Mahmood, Thomas Devereaux, Peter Abbamonte +1

We show theoretically that double photoemission (2 $e$ -ARPES) may be used to identify the pairing state in superconductors in which the Cooper pairs have a nonzero center-of-mass mo…

cond-mat.str-el2025

Tuning Incommensurate Charge Order in Ba $_{1 - x}$ Sr $_{x}$ Al $_{4}$ and Ba $_{1 - y}$ Eu $_{y}$ Al $_{4}$

Prathum Saraf, Eleanor M. Clements, Danila Sokratov +14

The BaAl $_{4}$ -type structure family is home to a vast landscape of interesting and exotic properties, with descendant crystal structures hosting a variety of electronic ground state…

cond-mat.mtrl-sci2022

A new quasi-one-dimensional transition metal chalcogenide semiconductor (Nb $_{4}$ Se $_{15}$ I $_{2}$ )I $_{2}$

Kejian Qu, Zachary W. Riedel, IriÃ¡n SÃ¡nchez-RamÃrez +8

The discovery of new low-dimensional transition metal chalcogenides is contributing to the already prosperous family of these materials. In this study, needle-shaped single crystal…

cond-mat.str-el2022

Stranger than Metals

Philip W. Phillips, Nigel E. Hussey, Peter Abbamonte

Although the resistivity in traditional metals increases with temperature, its $T$ dependence vanishes at low or high temperature, albeit for different reasons. Here, we review a c…

cond-mat.mtrl-sci2022

Ultrafast x-ray scattering reveals composite amplitude collective mode in the Weyl charge density wave material (TaSe $_{4}$ ) $_{2}$ I

Quynh L. Nguyen, Ryan A. Duncan, Gal Orenstein +27

We report ultrafast x-ray scattering experiments of the quasi-1D charge density wave (CDW) material (TaSe $_{4}$ ) $_{2}$ I following photoexcitation with femtosecond infrared laser pulses…

cond-mat.str-el2023

Consistency between reflection M-EELS and optical spectroscopy measurements of the long-wavelength density response of Bi $_{2}$ Sr $_{2}$ CaCu $_{2}$ O $_{8 + x}$

Jin Chen, Xuefei Guo, Christian Boyd +11

The density fluctuation spectrum captures many fundamental properties of strange metals. Using momentum-resolved electron energy-loss spectroscopy (M-EELS), we recently showed that…

cond-mat.str-el2023

Jamming and Unusual Charge Density Fluctuations of Strange Metals

Stephen J. Thornton, Danilo B. Liarte, Peter Abbamonte +2

The strange metallic regime across a number of high-temperature superconducting materials presents numerous challenges to the classic theory of Fermi liquid metals. Recent measurem…

cond-mat.str-el2012

Microscopic theory of resonant soft x-ray scattering in systems with charge order

David Benjamin, Dmitry Abanin, Peter Abbamonte +1

We present a microscopic theory of resonant soft x-ray scattering (RSXS) that accounts for the delocalized character of valence electrons. Unlike past approaches defined in terms o…

cond-mat.str-el2025

In-plane anisotropy of charge density wave fluctuations in 1 $T$ -TiSe $_{2}$

Xuefei Guo, Anshul Kogar, Jans Henke +17

We report measurements of anisotropic triple- $q$ charge density wave (CDW) fluctuations in the transition metal dichalcogenide 1 $T$ -TiSe $_{2}$ over a large volume of reciprocal space…

cond-mat.str-el2025

Comparative analysis of plasmon modes in layered Lindhard metals and strange metals

Niels de Vries, Jin Chen, Eric Hoglund +4

The enigmatic strange metal remains one of the central unsolved problems of 21st century science. Understanding this phase of matter requires knowledge of the momentum- and energy-…

cond-mat.str-el2025

Quantum Fisher Information Reveals UV-IR Mixing in the Strange Metal

David BaÅut, Xuefei Guo, Niels de Vries +4

The density-density response in optimally doped Bi $_{2}$ Sr $_{2}$ CaCu $_{2}$ O $_{8 + x}$ has recently been shown to exhibit conformal symmetry. Using, the experimentally inferred conformal dy…

cond-mat.str-el2026

Kondo driven suppression of charge density wave in Van der Waals material UTe $_{3}$

Justin Shotton, Jiahui Zhu, David Martinez +22

Competing electronic instabilities lie at the heart of emergent phenomena in quantum materials. In low-dimensional metals, Fermi-surface nesting can drive charge density wave (CDW)…

cond-mat.mes-hall2025

Observation of a dynamic magneto-chiral instability in photoexcited tellurium

Yijing Huang, Nick Abboud, Yinchuan Lv +12

In a system of charged chiral fermions driven out of equilibrium, an electric current parallel to the magnetic field can generate a dynamic instability by which electromagnetic wav…

cond-mat.str-el2021

Reply to arXiv:2103.10268 `Comment on "Crossover of Charge Fluctuations across the Strange Metal Phase Diagram'''

Ali Husain, Matteo Mitrano, Melinda S. Rak +8

We recently reported [1,2] measurements of the charge density fluctuations in the strange metal cuprate Bi $_{2.1}$ Sr $_{1.9}$ Ca $_{1.0}$ Cu $_{2.0}$ O $_{8 + x}$ using both reflection M-EE…

cond-mat.str-el2011

The electron many-body problem in graphene

Bruno Uchoa, James P. Reed, Yu Gan +4

We give a brief summary of the current status of the electron many-body problem in graphene. We claim that graphene has intrinsic dielectric properties which should dress the inter…

cond-mat.supr-con2017

Influence of domain walls in the incommensurate charge density wave state of Cu intercalated 1 $T$ -TiSe $_{2}$

Shichao Yan, Davide Iaia, Emilia Morosan +3

We report a low-temperature scanning tunneling microscopy study of the charge density wave (CDW) order in 1 $T$ -TiSe $_{2}$ and Cu $_{0.08}$ TiSe $_{2}$ . In pristine 1 $T$ -TiSe $_{2}$ we observ…

cond-mat.str-el2026

Charge order-driven nematicity in the nickel-pnictide superconductor Ba $_{1 - x}$ Sr $_{x}$ Ni $_{2}$ As $_{2}$

Thomas Johnson, Camille Bernal-Choban, Sangjun Lee +8

Nematic order refers to the spontaneous breaking of rotational symmetry while preserving translational symmetry. First identified in classical liquid crystals, nematic order arises…

cond-mat.str-el2009

Two-step stabilization of orbital order and the dynamical frustration of spin in the model charge-transfer insulator KCuF3

James C. T. Lee, Shi Yuan, Siddhartha Lal +9

We report a combined experimental and theoretical study of KCuF3, which offers - because of this material's relatively simple lattice structure and valence configuration (d9, i.e.,…

cond-mat.str-el2019

Evidence for photoinduced sliding of the charge-order condensate in La $_{1.875}$ Ba $_{0.125}$ CuO $_{4}$

Matteo Mitrano, Sangjun Lee, Ali A. Husain +13

We use femtosecond resonant soft x-ray scattering to measure the ultrafast optical melting of charge-order correlations in La $_{1.875}$ Ba $_{0.125}$ CuO $_{4}$ . By analyzing both the en…

cond-mat.str-el2025

Magnetic polaron formation in EuZn $_{2}$ P $_{2}$

Matthew S. Cook, Elizabeth A. Peterson, Caitlin S. Kengle +10

Colossal magnetoresistance (CMR) has been observed across many Eu $^{2 +}$ -based materials; however, its origin is not completely understood. Here we investigate the antiferromagneti…

cond-mat.str-el2018

Signatures of exciton condensation in a transition metal dichalcogenide

Anshul Kogar, Melinda S. Rak, Sean Vig +9

Bose condensation has shaped our understanding of macroscopic quantum phenomena, having been realized in superconductors, atomic gases, and liquid helium. Excitons are bosons that…

cond-mat.mtrl-sci2022

Transport and optical properties of the chiral semiconductor Ag3AuSe2

Juyeon Won, Soyeun Kim, Martin Gutierrez-Amigo +9

Previous band structure calculations predicted Ag3AuSe2 to be a semiconductor with a band gap of approximately 1 eV. Here, we report single crystal growth of Ag3AuSe2 and its trans…

cond-mat.supr-con2019

Sixfold enhancement of superconductivity in a tunable electronic nematic system

Chris Eckberg, Daniel J. Campbell, Tristin Metz +10

The electronic nematic phase, wherein electronic degrees of freedom lower the crystal rotational symmetry, is a common motif across a number of high-temperature superconductors. Ho…

hep-ph2022

Revisiting the Dark Matter Interpretation of Excess Rates in Semiconductors

Peter Abbamonte, Daniel Baxter, Yonatan Kahn +4

In light of recent results from low-threshold dark matter detectors, we revisit the possibility of a common dark matter origin for multiple excesses across numerous direct detectio…

cond-mat.supr-con2017

Measurement of the dynamic charge response of materials using low-energy, momentum-resolved electron energy-loss spectroscopy (M-EELS)

Sean Vig, Anshul Kogar, Matteo Mitrano +9

One of the most fundamental properties of an interacting electron system is its frequency- and wave-vector-dependent density response function, $I ¨ (q, I ¨ )$ . The imaginary part…

cond-mat.supr-con2020

Extracting correlation effects from Momentum-Resolved Electron Energy Loss Spectroscopy (M-EELS): Synergistic origin of the dispersion kink in Bi $_{2.1}$ Sr $_{1.9}$ CaCu $_{2}$ O $_{8 + x}$

Edwin W. Huang, Kridsanaphong Limtragool, Chandan Setty +4

We employ Momentum-Resolved Electron Energy Loss Spectroscopy (M-EELS) on Bi2.1Sr1.9CaCu2O8+x to resolve the issue of the kink feature in the electron dispersion widely observed in…

cond-mat.str-el2017

Quasiparticle Interference and Strong Electron-Mode Coupling in the Quasi-One-Dimensional Bands of Sr $_{2}$ RuO $_{4}$

Zhenyu Wang, Daniel Walkup, Philip Derry +13

The single-layered ruthenate Sr $_{2}$ RuO $_{4}$ has attracted a great deal of interest as a spin-triplet superconductor with an order parameter that may potentially break time reversal…

cond-mat.str-el2021

Search for $Q \sim 0$ order near a forbidden Bragg position in Bi $_{2.1}$ Sr $_{1.9}$ CaCu $_{2}$ O $_{8 + x}$ with resonant soft x-ray scattering

Xuefei Guo, Sangjun Lee, Thomas A. Johnson +13

Identifying what broken symmetries are present in the cuprates has become a major area of research. Many authors have reported evidence for so-called " $Q \sim 0$ " order that involv…

cond-mat.str-el2018

Inequivalence of the zero-momentum Limits of Transverse and Longitudinal Dielectric Response in the Cuprates

Chandan Setty, Bikash Padhi, Kridsanaphong Limtragool +4

We address the question of the mismatch between the zero momentum limits of the transverse and longitudinal dielectric functions for a fixed direction of the driving field observed…

cond-mat.str-el2021

Ultrafast renormalization of the onsite Coulomb repulsion in a cuprate superconductor

Denitsa R. Baykusheva, Hoyoung Jang, Ali A. Husain +14

Ultrafast lasers are an increasingly important tool to control and stabilize emergent phases in quantum materials. Among a variety of possible excitation protocols, a particularly…

cond-mat.str-el2024

Disorder and diffuse scattering in single-chirality (TaSe $_{4}$ ) $_{2}$ I crystals

Jacob A. Christensen, Simon Bettler, Kejian Qu +11

The quasi-one-dimensional chiral compound (TaSe $_{4}$ ) $_{2}$ I has been extensively studied as a prime example of a topological Weyl semimetal. Upon crossing its phase transition temper…

cond-mat.supr-con2017

Observation of a Charge Density Wave Incommensuration Near the Superconducting Dome in CuxTiSe2

Anshul Kogar, Gilberto A. de la Pena, Sangjun Lee +8

X-ray diffraction was employed to study the evolution of the charge density wave (CDW) in CuxTiSe2 as a function of copper intercalation in order to clarify the relationship betwee…

cond-mat.mes-hall2026

Quantum Geometry and Topology of Bulk Plasmons in Weyl Metals

Hong-Yi Xie, Peter Abbamonte, Bruno Uchoa

We address the quantum geometric structure of plasmons in Fermi surfaces enclosing a topological charge. We demonstrate that Weyl fermion plasmons have monopole structure, are topo…

cond-mat.str-el2024

Absence of bulk charge density wave order in the normal state of UTe $_{2}$

Caitlin S. Kengle, Jakub Vonka, Sonia Francoual +5

A spatially modulated superconducting state, known as pair density wave (PDW), is a tantalizing state of matter with unique properties. Recent scanning tunneling microscopy (STM) s…

cond-mat.str-el2024

Absence of a bulk charge density wave signature in x-ray measurements of UTe $_{2}$

Caitlin S. Kengle, Dipanjan Chaudhuri, Xuefei Guo +12

The long-sought pair density wave (PDW) is an exotic phase of matter in which charge density wave (CDW) order is intertwined with the amplitude or phase of coexisting, superconduct…

cond-mat.str-el2012

Resonant soft x-ray scattering, stripe order, and the electron spectral function in cuprates

Peter Abbamonte, Eugene Demler, J. C. Seamus Davis +1

We review the current state of efforts to use resonant soft x-ray scattering (RSXS), which is an elastic, momentum-resolved, valence band probe of strongly correlated electron syst…

cond-mat.str-el2023

Angle-Resolved Pair Photoemission Theory for Correlated Electrons

Thomas P. Devereaux, Martin Claassen, Xu-Xin Huang +6

In this paper we consider the possibility and conditions for pair photoemission whereby two incident photons emit pairs of electrons from a candidate material as a novel method to…

cond-mat.mes-hall2025

Quantum entanglement and quantum geometry measured with inelastic X-ray scattering

David BaÅut, Barry Bradlyn, Peter Abbamonte

Using inelastic X-ray scattering (IXS), we experimentally investigate the quantum geometry and quantum information in the large-gap insulator, LiF. Using sum rules for the density-…

cond-mat.str-el2024

Conformally invariant charge fluctuations in a strange metal

Xuefei Guo, Jin Chen, Farzaneh Hoveyda-Marashi +11

The strange metal is a peculiar phase of matter in which the electron scattering rate, $I ¨ ^{- 1} \sim k_{B} T /ℏ$ , which determines the electrical resistance, is universal across a…

cond-mat.str-el2025

Measurement of the dynamic charge susceptibility near the charge density wave transition in ErTe $_{3}$

Dipanjan Chaudhuri, Qianni Jiang, Xuefei Guo +9

A charge density wave (CDW) is a phase of matter characterized by a periodic modulation of the valence electron density accompanied by a distortion of the lattice structure. The mi…

cond-mat.str-el2019

Unconventional Charge Density Wave Order in the Pnictide Superconductor Ba(Ni $_{1 - x}$ Co $_{x}$ ) $_{2}$ As $_{2}$

Sangjun Lee, Gilberto de la Pena, Stella X. -L. Sun +10

Ba(Ni $_{1 - x}$ Co $_{x}$ ) $_{2}$ As $_{2}$ is a structural homologue of the pnictide high temperature superconductor, Ba(Fe $_{1 - x}$ Co $_{x}$ ) $_{2}$ As $_{2}$ , in which the Fe atoms are replaced by Ni.…

cond-mat.mtrl-sci2023

Coexistence of surface oxygen vacancy and interface conducting states in LaAlO3/SrTiO3 revealed by low-angle resonant soft X-ray scattering

Ming Yang, Ariando Ariando, Caozheng Diao +13

Oxide heterostructures have shown rich physics phenomena, particularly in the conjunction of exotic insulator-metal transition (IMT) at the interface between polar insulator LaAlO3…

cond-mat.mes-hall2025

Spectral Density and Sum Rules for Second-Order Response Functions

Barry Bradlyn, Peter Abbamonte

Sum rules for linear response functions give powerful and experimentally-relevant relations between frequency moments of response functions and ground state properties. In particul…

cond-mat.supr-con2024

Measuring the Debye Energy in Superconductors via two Electron Photoemission Spectroscopy

Ka Ho Wong, Jack Zwettler, Henry Amir +3

We demonstrate theoretically that double angle resolved photoemission spectroscopy (2eARPES) can directly probe the existence of Cooper pairs away from the Fermi surface, and can t…

physics.ins-det2017

Intrinsic resolving power of XUV diffraction gratings measured with Fizeau interferometry

Samuel Gleason, Jonathan Manton, Janet Sheung +6

We introduce a method for using Fizeau interferometry to measure the intrinsic resolving power of a diffraction grating. This method is more accurate than traditional techniques ba…

cond-mat.str-el2018

Ultrafast time-resolved x-ray scattering reveals diffusive charge order dynamics in La $_{2 - x}$ Ba $_{x}$ CuO $_{4}$

Matteo Mitrano, Sangjun Lee, Ali A. Husain +15

Charge order is universal among high-T $_{c}$ cuprates but its relevance to superconductivity is not established. It is widely believed that, while static order competes with supercon…

hep-ph2020

Reply to Robinson and Michaud, arXiv:2002.08893

Noah Kurinsky, Daniel Baxter, Yonatan Kahn +2

We respond to Robinson and Michaud's (RM) comment (arXiv:2002.08893) on our recent preprint arXiv:2002.06937, in which we discuss recent excesses in low-threshold dark matter searc…

cond-mat.mes-hall2026

Plasmon-driven exciton formation in a non-equilibrium Fermi liquid

Rishi Acharya, Eli Gerber, Nina Bielinski +13

Collective modes in Fermi liquids are usually regarded as dissipation channels that relax electronic excitations through Landau damping. Whether such modes can instead mediate the…

cond-mat.mes-hall2026

Fundamental Tests of Quantum Geometric Bounds in Ionic and Covalent Insulators using Inelastic X-Ray Scattering

David BaÅut, Barry Bradlyn, Marcus D. Collins +1

Quantum geometry underlies many fundamental properties of materials, but it has remained largely inaccessible to direct experiment. Here we demonstrate that inelastic x-ray scatter…

Publications (69)

The effective fine structure constant of freestanding graphene measured in graphite

Generic character of charge and spin density waves in superconducting cuprates

Crystallographic refinement of collective excitations using standing wave inelastic x-ray scattering

Topology-Driven Vibrations in a Chiral Polar Vortex Lattice

Electronic reconstruction at SrMnO3-LaMnO3 superlattice interfaces

The importance of sigma bonding electrons for the accurate description of electron correlation in graphene

Observation of orbital order in the Van der Waals material 1T-TiSe2

Doping-dependence of the electron-phonon coupling in two families of bilayer superconducting cuprates

Two-electron photoemission spectroscopy in Topological Superconductors

A reexamination of the effective fine structure constant of graphene, as measured in graphite

Absence of long-ranged charge order in Nax​Ca2−x​CuO2​Cl2​ at x=0.08

Temperature-resolution anomalies in the reconstruction of time dynamics from energy-loss experiments

First-principles method of propagation of tightly bound excitons: exciton band structure of LiF and verification with inelastic x-ray scattering

Absence of precursor incommensurate charge order in electronic nematic Ba0.35Sr0.65Ni2As2

Reexamining the strange metal charge response with transmission inelastic electron scattering

Collective charge excitations studied by electron energy-loss spectroscopy

The effect of electron correlation on the electronic structure and spin-lattice coupling of the high-Tc​ cuprates: quantum Monte Carlo calculations

Anharmonic multiphonon origin of the valence plasmon in SrTi1-xNbxO3

Kramers-Weyl fermions in the chiral charge density wave material (TaSe4​)2​I

Multiple charge density waves and superconductivity nucleation at antiphase domain walls in the nematic pnictide Ba1−x​Srx​Ni2​As2​

Distinguishing finite momentum superconducting pairing states with two-electron photoemission spectroscopy

Tuning Incommensurate Charge Order in Ba1−x​Srx​Al4​ and Ba1−y​Euy​Al4​

A new quasi-one-dimensional transition metal chalcogenide semiconductor (Nb4​Se15​I2​)I2​

Stranger than Metals

Ultrafast x-ray scattering reveals composite amplitude collective mode in the Weyl charge density wave material (TaSe4​)2​I

Consistency between reflection M-EELS and optical spectroscopy measurements of the long-wavelength density response of Bi2​Sr2​CaCu2​O8+x​

Jamming and Unusual Charge Density Fluctuations of Strange Metals

Microscopic theory of resonant soft x-ray scattering in systems with charge order

In-plane anisotropy of charge density wave fluctuations in 1T-TiSe2​

Comparative analysis of plasmon modes in layered Lindhard metals and strange metals

Quantum Fisher Information Reveals UV-IR Mixing in the Strange Metal

Kondo driven suppression of charge density wave in Van der Waals material UTe3​

Observation of a dynamic magneto-chiral instability in photoexcited tellurium

Reply to arXiv:2103.10268 `Comment on "Crossover of Charge Fluctuations across the Strange Metal Phase Diagram'''

The electron many-body problem in graphene

Influence of domain walls in the incommensurate charge density wave state of Cu intercalated 1T-TiSe2​

Charge order-driven nematicity in the nickel-pnictide superconductor Ba1−x​Srx​Ni2​As2​

Two-step stabilization of orbital order and the dynamical frustration of spin in the model charge-transfer insulator KCuF3

Evidence for photoinduced sliding of the charge-order condensate in La1.875​Ba0.125​CuO4​

Magnetic polaron formation in EuZn2​P2​

Signatures of exciton condensation in a transition metal dichalcogenide

Transport and optical properties of the chiral semiconductor Ag3AuSe2

Sixfold enhancement of superconductivity in a tunable electronic nematic system

Revisiting the Dark Matter Interpretation of Excess Rates in Semiconductors

Measurement of the dynamic charge response of materials using low-energy, momentum-resolved electron energy-loss spectroscopy (M-EELS)

Extracting correlation effects from Momentum-Resolved Electron Energy Loss Spectroscopy (M-EELS): Synergistic origin of the dispersion kink in Bi2.1​Sr1.9​CaCu2​O8+x​

Quasiparticle Interference and Strong Electron-Mode Coupling in the Quasi-One-Dimensional Bands of Sr2​RuO4​

Search for Q∼0 order near a forbidden Bragg position in Bi2.1​Sr1.9​CaCu2​O8+x​ with resonant soft x-ray scattering

Inequivalence of the zero-momentum Limits of Transverse and Longitudinal Dielectric Response in the Cuprates

Ultrafast renormalization of the onsite Coulomb repulsion in a cuprate superconductor

Disorder and diffuse scattering in single-chirality (TaSe4​)2​I crystals

Observation of a Charge Density Wave Incommensuration Near the Superconducting Dome in CuxTiSe2

Quantum Geometry and Topology of Bulk Plasmons in Weyl Metals

Absence of bulk charge density wave order in the normal state of UTe2​

Absence of a bulk charge density wave signature in x-ray measurements of UTe2​

Resonant soft x-ray scattering, stripe order, and the electron spectral function in cuprates

Angle-Resolved Pair Photoemission Theory for Correlated Electrons

Quantum entanglement and quantum geometry measured with inelastic X-ray scattering

Conformally invariant charge fluctuations in a strange metal

Measurement of the dynamic charge susceptibility near the charge density wave transition in ErTe3​

Unconventional Charge Density Wave Order in the Pnictide Superconductor Ba(Ni1−x​Cox​)2​As2​

Coexistence of surface oxygen vacancy and interface conducting states in LaAlO3/SrTiO3 revealed by low-angle resonant soft X-ray scattering

Spectral Density and Sum Rules for Second-Order Response Functions

Measuring the Debye Energy in Superconductors via two Electron Photoemission Spectroscopy

Intrinsic resolving power of XUV diffraction gratings measured with Fizeau interferometry

Ultrafast time-resolved x-ray scattering reveals diffusive charge order dynamics in La2−x​Bax​CuO4​

Reply to Robinson and Michaud, arXiv:2002.08893

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Ultrafast time-resolved x-ray scattering reveals diffusive charge order dynamics in La $_{2 - x}$ Ba $_{x}$ CuO $_{4}$