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Publications (39)

cond-mat.str-el2016

Probing inter- and intrachain Zhang-Rice excitons in Li $_{2}$ CuO $_{2}$ and determining their binding energy

Claude Monney, Valentina Bisogni, Ke-Jin Zhou +8

Cuprate materials, like those hosting high temperature superconductivity, represent a famous class of materials where the correlations between the strongly entangled charges and sp…

cond-mat.str-el2011

Two-Spinon and Orbital Excitations of the Spin-Peierls System TiOCl

Sebastian Glawion, Jakoba Heidler, Maurits W. Haverkort +8

We combine high-resolution resonant inelastic x-ray scattering with cluster calculations utilizing a recently derived effective magnetic scattering operator to analyze the polariza…

cond-mat.other2008

Elementary structural building blocks encountered in silicon surface reconstructions

Corsin Battaglia, Katalin Gaal-Nagy, Claude Monney +5

Driven by the reduction of dangling bonds and the minimization of surface stress, reconstruction of silicon surfaces leads to a striking diversity of outcomes. Despite this variety…

cond-mat.str-el2026

Electronic band structure reconstruction in Ni $_{x}$ ZrTe $_{2}$

Pedro H. A. Moya, Marli R. Cantarino, Lucas E. Correa +6

The filling of the large van der Waals gap in Transition Metal Dichalcogenides (TMDs) often leads to lattice and electronic instabilities, which prelude the onset of a rich phenome…

cond-mat.mtrl-sci2023

Persistence of structural distortion and bulk band Rashba splitting in SnTe above its ferroelectric critical temperature

FrÃ©dÃ©ric Chassot, Aki Pulkkinen, Geoffroy Kremer +8

The ferroelectric semiconductor $I^\pm$ -SnTe has been regarded as a topological crystalline insulator and the dispersion of its surface states has been intensively measured with angle…

cond-mat.str-el2022

Modified interlayer stacking and insulator to correlated-metal transition driven by uniaxial strain in 1 $T$ -TaS $_{2}$

Christopher W. Nicholson, Francesco Petocchi, BjÃ¶rn Salzmann +6

Interlayer coupling is strongly implicated in the complex electronic properties of 1 $T$ -TaS $_{2}$ , but the interplay between this and electronic correlations remains unresolved. Her…

cond-mat.mtrl-sci2025

Conduction Band Structure and Ultrafast Dynamics of Ferroelectric $I^\pm$ -GeTe(111)

Geoffroy Kremer, Laurent NicolaÃ¯, FrÃ©dÃ©ric Chassot +9

$I^\pm$ -GeTe(111) is a non-centrosymmetric ferroelectric (FE) material for which a significative lattice distortion combined with a strong spin-orbit interaction gives rise to giant R…

cond-mat.str-el2012

Determining the Short-Range Spin Correlations in Cuprate Chain Materials with Resonant Inelastic X-ray Scattering

Claude Monney, Valentina Bisogni, Ke Jin Zhou +13

We report a high-resolution resonant inelastic soft x-ray scattering study of the quantum magnetic spin-chain materials Li2CuO2 and CuGeO3. By tuning the incoming photon energy to…

cond-mat.str-el2012

Three-Dimensional Fermiology by Soft-X-Ray ARPES: Origin of Charge Density Waves in VSe2

Vladimir N. Strocov, Ming Shi, Masaki Kobayashi +7

Electronic structure of crystalline materials is their fundamental characteristic which is the basis of almost all their physical and chemical properties. Angle-resolved photoemiss…

cond-mat.str-el2013

Femtosecond dynamics of magnetic excitations from resonant inelastic x-ray scattering in CaCu2O3

Valentina Bisogni, Stefanos Kourtis, Claude Monney +10

Taking spinon excitations in the quantum antiferromagnet CaCu2O3 as an example, we demonstrate that femtosecond dynamics of magnetic excitations can be probed by direct resonant in…

cond-mat.str-el2016

Orbital breathing effects in the computation of x-ray d-ion spectra in solids by ab initio wave-function-based methods

Nikolay A. Bogdanov, Valentina Bisogni, Roberto Kraus +8

In existing theoretical approaches to core-level excitations of transition-metal ions in solids relaxation and polarization effects due to the inner core hole are often ignored or…

cond-mat.str-el2025

Revealing electronic correlations in YNi $_{2}$ B $_{2}$ C using photoemission spectroscopy

Aki Pulkkinen, Geoffroy Kremer, Vladimir N. Strocov +3

We present a combined density functional theory (DFT), one-step model of photoemission, and soft x-ray angle-resolved photoemission spectroscopy (SX-ARPES) study of the electronic…

cond-mat.str-el2023

Observation of the metallic mosaic phase in 1 $T$ -TaS $_{2}$ at equilibrium

BjÃ¶rn Salzmann, Elina Hujala, Catherine Witteveen +5

The transition-metal dichalcogenide tantalum disulphide (1 $T$ -TaS $_{2}$ ) hosts a commensurate charge density wave (CCDW) at temperatures below 165~K where it also becomes insulating.…

cond-mat.supr-con2026

Disorder-induced damping of spin excitations in Cr-doped BaFe $_{2}$ As $_{2}$

Marli R. Cantarino, Rafael M. P. Teixeira, R. Pakuszewski +9

In doped Hund's metals, such as the iron-based superconductors, effects like charge doping and chemical pressure are often considered the dominant factors. Partial chemical substit…

cond-mat.other2008

Atomically precise Si(331)-(12x1) surfaces

Corsin Battaglia, Claude Monney, Clement Didiot +4

Si(331)-(12x1) is the only confirmed planar silicon surface with a stable reconstruction located between (111) and (110). We have optimized the annealing sequence and are able to o…

cond-mat.mtrl-sci2022

Field-induced ultrafast modulation of Rashba coupling at room temperature in ferroelectric $I^\pm$ -GeTe(111)

Geoffroy Kremer, Julian Maklar, Laurent NicolaÃ¯ +11

Rashba materials have appeared as an ideal playground for spin-to-charge conversion in prototype spintronics devices. Among them, $I^\pm$ -GeTe(111) is a non-centrosymmetric ferroelect…

cond-mat.str-el2018

Inhibition of the photoinduced structural phase transition in the excitonic insulator Ta $_{2}$ NiSe $_{5}$

Selene Mor, Marc Herzog, Johannes Noack +7

Femtosecond time-resolved mid-infrared reflectivity is used to investigate the electron and phonon dynamics occurring at the direct band gap of the excitonic insulator Ta $_{2}$ NiSe$_…

cond-mat.mtrl-sci2025

Suppression of stripe-ordered structural phases in monolayer IrTe $_{2}$ by a gold substrate

Kati Asikainen, FrÃ©dÃ©ric Chassot, Baptiste Hildebrand +12

Metal-assisted exfoliation of two-dimensional (2D) materials has emerged as an efficient route to isolating large-area monolayer crystals, yet the influence of the supporting metal…

cond-mat.str-el2020

Role of a higher dimensional interaction in stabilizing charge density waves in quasi-1D NbSe $_{3}$ revealed by angle-resolved photoemission spectroscopy

Christopher W. Nicholson, Eike F. Schwier, Kenya Shimada +4

We revisit charge density wave (CDW) behavior in the archetypal quasi-one-dimensional (quasi-1D) material NbSe $_{3}$ by high-resolution angle-resolved photoemission spectroscopy meas…

cond-mat.str-el2022

Precursor phase with full phonon softening above the charge-density-wave phase transition in $2 H$ -TaSe $_{2}$

Xingchen Shen, Rolf Heid, Roland Hott +8

Research on charge-density-wave (CDW) ordered transition-metal dichalcogenides continues to unravel new states of quantum matter correlated to the intertwined lattice and electroni…

cond-mat.mtrl-sci2026

Ultrafast dynamics of excitons in black phosphorus

Geoffroy Kremer, Juan F. P. Mosquera, JoÃ«l Morf +9

Excitons are key quasiparticles determining the optical properties of solids. As such, they can be utilized to coherently control the electronic structure of materials using optica…

cond-mat.str-el2017

Dimensional Crossover in a Charge Density Wave Material Probed by Angle-Resolved Photoemission Spectroscopy

Christopher W. Nicholson, Christophe Berthod, Michele Puppin +4

High-resolution angle-resolved photoemission spectroscopy (ARPES) data reveal evidence of a crossover from one-dimensional (1D) to three-dimensional (3D) behavior in the prototypic…

cond-mat.str-el2022

Ultrafast charge carrier and exciton dynamics in an excitonic insulator probed by time-resolved photoemission spectroscopy

Selene Mor, Marc Herzog, Claude Monney +1

An excitonic insulator phase is expected to arise from the spontaneous formation of electron-hole pairs (excitons) in semiconductors where the exciton binding energy exceeds the si…

cond-mat.mtrl-sci2021

Break of symmetry at the surface of IrTe $_{2}$ upon phase transition measured by X-ray photoelectron diffraction

Maxime Rumo, Aki Pulkkinen, KeYuan Ma +3

IrTe $_{2}$ undergoes a series of charge-ordered phase transitions below room temperature that are characterized by the formation of stripes of Ir dimers of different periodicities. F…

cond-mat.mes-hall2017

Generation and evolution of spin-, valley- and layer-polarized excited carriers in inversion-symmetric WSe2

Roman Bertoni, Christopher W. Nicholson, Lutz Waldecker +11

Manipulation of spin and valley degrees of freedom is a key step towards realizing novel quantum technologies, for which atomically thin transition metal dichalcogenides (TMDCs) ha…

cond-mat.str-el2015

Orbital control of effective dimensionality: from spin-orbital fractionalization to confinement in the anisotropic ladder system CaCu2O3

Valentina Bisogni, Krzysztof Wohlfeld, Satoshi Nishimoto +11

Fractionalization of an electronic quasiparticle into spin, charge and orbital parts is a fundamental and characteristic property of interacting electrons in one dimension. However…

cond-mat.str-el2017

Ultrafast Electronic Band Gap Control in an Excitonic Insulator

Selene Mor, Marc Herzog, Denis GoleÅ¾ +8

We report on the nonequilibrium dynamics of the electronic structure of the layered semiconductor Ta $_{2}$ NiSe $_{5}$ investigated by time- and angle-resolved photoelectron spectroscopy…

cond-mat.str-el2019

Fernando A. Garcia, Oleh Ivashko, Daniel E. McNally +7

It is currently understood that high temperature superconductivity (SC) in the transition metal $(M)$ substituted iron arsenides Ba(Fe $_{1 - x}$ $M$ $_{x}$ ) $_{2}$ As $_{2}$ is promoted b…

cond-mat.supr-con2023

Incoherent electronic band states in Mn-substituted BaFe $_{2}$ As $_{2}$

Marli R. Cantarino, Kevin R. Pakuszewski, BjÃ¶rn Salzmann +8

Chemical substitution is commonly used to explore new ground states in materials, yet the role of disorder is often overlooked. In Mn-substituted BaFe $_{2}$ As $_{2}$ (MnBFA), superc…

cond-mat.str-el2020

Novel Cu-based dz2 order at a YBa2Cu3O7/ manganite interface

Roxana Gaina, Christopher W. Nicholson, Maxime Rumo +12

The interplay of nearly degenerate orders in quantum materials can lead to a myriad of emergent phases. A prominent case is that of the high-Tc cuprates for which the relationship…

cond-mat.other2008

A new structural model for the Si(331)-(12x1) reconstruction

Corsin Battaglia, Katalin Gaal-Nagy, Claude Monney +5

A new structural model for the Si(331)-(12x1) reconstruction is proposed. Based on scanning tunneling microscopy images of unprecedented resolution, low-energy electron diffraction…

cond-mat.str-el2022

Mott versus hybridization gap in the low-temperature phase of $1 T$ -TaS $_{2}$

Francesco Petocchi, Christopher W. Nicholson, Bjoern Salzmann +4

We compute the correlated electronic structure of stacked $1 T$ -TaS $_{2}$ bilayers using the $G W$ + EDMFT method. Depending on the surface termination, the semi-infinite uncorrelated…

cond-mat.str-el2025

Detection of Image Potential States above the vacuum level in GeTe

The ferroelectric semiconductor Î±-GeTe(111) has attracted significant attention in the last decade due to its unique properties, with extensive studies focusing on its occupied el…

cond-mat.mtrl-sci2020

Misfit layer compounds: a platform for heavily-doped two-dimensional transition metal dichalcogenides

RaphaÃ«l T. Leriche, Alexandra Palacio-Morales, Marco Campetella +14

Transition metal dichalcogenides (TMDs) display a rich variety of instabilities such as spin and charge orders, Ising superconductivity and topological properties. Their physical p…

cond-mat.supr-con2023

Protection of Ising spin-orbit coupling in bulk misfit superconductors

Tomas Samuely, Darshana Wickramaratne, Martin Gmitra +16

Low-dimensional materials have remarkable properties that are distinct from their bulk counterparts. A paradigmatic example is Ising superconductivity that occurs in monolayer mate…

cond-mat.str-el2024

Composite antiferromagnetic and orbital order with altermagnetic properties at a cuprate/manganite interface

Subhrangsu Sarkar, Roxana Capu, Yurii G. Pashkevich +12

Heterostructures from complex oxides allow one to combine various electronic and magnetic orders as to induce new quantum states. A prominent example is the coupling between superc…

cond-mat.str-el2015

Electron-lattice interactions strongly renormalize the charge transfer energy in the spin-chain cuprate Li $_{2}$ CuO $_{2}$

Steve Johnston, Claude Monney, Valentina Bisogni +9

Strongly correlated insulators are broadly divided into two classes: Mott-Hubbard insulators, where the insulating gap is driven by the Coulomb repulsion $U$ on the transition-meta…

cond-mat.mtrl-sci2012

Scanning tunneling microscopy at multiple voltage biases of stable "ring-like" Ag clusters on Si(111)-(7 $\times$ 7)

Since more than twenty years it is known that deposition of Ag onto Si(111)-(7\times7) leads under certain conditions to the formation of so-called "ring-like" clusters, that are p…

cond-mat.supr-con2022

Electron-momentum dependence of electron-phonon coupling underlies dramatic phonon renormalization in YNi $_{2}$ B $_{2}$ C

Philipp Kurzhals, Geoffroy Kremer, Thomas Jaouen +12

Electron-phonon coupling, i.e., the scattering of lattice vibrations by electrons and vice versa, is ubiquitous in solids and can lead to emergent ground states such as superconduc…

Publications (39)

Probing inter- and intrachain Zhang-Rice excitons in Li2​CuO2​ and determining their binding energy

Two-Spinon and Orbital Excitations of the Spin-Peierls System TiOCl

Elementary structural building blocks encountered in silicon surface reconstructions

Electronic band structure reconstruction in Nix​ZrTe2​

Persistence of structural distortion and bulk band Rashba splitting in SnTe above its ferroelectric critical temperature

Modified interlayer stacking and insulator to correlated-metal transition driven by uniaxial strain in 1T-TaS2​

Conduction Band Structure and Ultrafast Dynamics of Ferroelectric I^±-GeTe(111)

Determining the Short-Range Spin Correlations in Cuprate Chain Materials with Resonant Inelastic X-ray Scattering

Three-Dimensional Fermiology by Soft-X-Ray ARPES: Origin of Charge Density Waves in VSe2

Femtosecond dynamics of magnetic excitations from resonant inelastic x-ray scattering in CaCu2O3

Orbital breathing effects in the computation of x-ray d-ion spectra in solids by ab initio wave-function-based methods

Revealing electronic correlations in YNi2​B2​C using photoemission spectroscopy

Observation of the metallic mosaic phase in 1T-TaS2​ at equilibrium

Disorder-induced damping of spin excitations in Cr-doped BaFe2​As2​

Atomically precise Si(331)-(12x1) surfaces

Field-induced ultrafast modulation of Rashba coupling at room temperature in ferroelectric I^±-GeTe(111)

Inhibition of the photoinduced structural phase transition in the excitonic insulator Ta2​NiSe5​

Suppression of stripe-ordered structural phases in monolayer IrTe2​ by a gold substrate

Role of a higher dimensional interaction in stabilizing charge density waves in quasi-1D NbSe3​ revealed by angle-resolved photoemission spectroscopy

Precursor phase with full phonon softening above the charge-density-wave phase transition in 2H-TaSe2​

Ultrafast dynamics of excitons in black phosphorus

Dimensional Crossover in a Charge Density Wave Material Probed by Angle-Resolved Photoemission Spectroscopy

Ultrafast charge carrier and exciton dynamics in an excitonic insulator probed by time-resolved photoemission spectroscopy

Break of symmetry at the surface of IrTe2​ upon phase transition measured by X-ray photoelectron diffraction

Generation and evolution of spin-, valley- and layer-polarized excited carriers in inversion-symmetric WSe2

Orbital control of effective dimensionality: from spin-orbital fractionalization to confinement in the anisotropic ladder system CaCu2O3

Ultrafast Electronic Band Gap Control in an Excitonic Insulator

Anisotropic magnetic excitations and incipient NÃ©el order in Ba(Fe1−x​Mnx​)2​As2​

Incoherent electronic band states in Mn-substituted BaFe2​As2​

Novel Cu-based dz2 order at a YBa2Cu3O7/ manganite interface

A new structural model for the Si(331)-(12x1) reconstruction

Mott versus hybridization gap in the low-temperature phase of 1T-TaS2​

Detection of Image Potential States above the vacuum level in GeTe

Misfit layer compounds: a platform for heavily-doped two-dimensional transition metal dichalcogenides

Protection of Ising spin-orbit coupling in bulk misfit superconductors

Composite antiferromagnetic and orbital order with altermagnetic properties at a cuprate/manganite interface

Electron-lattice interactions strongly renormalize the charge transfer energy in the spin-chain cuprate Li2​CuO2​

Scanning tunneling microscopy at multiple voltage biases of stable "ring-like" Ag clusters on Si(111)-(7×7)

Electron-momentum dependence of electron-phonon coupling underlies dramatic phonon renormalization in YNi2​B2​C

Probing inter- and intrachain Zhang-Rice excitons in Li $_{2}$ CuO $_{2}$ and determining their binding energy

Electronic band structure reconstruction in Ni $_{x}$ ZrTe $_{2}$

Modified interlayer stacking and insulator to correlated-metal transition driven by uniaxial strain in 1 $T$ -TaS $_{2}$

Conduction Band Structure and Ultrafast Dynamics of Ferroelectric $I^\pm$ -GeTe(111)

Revealing electronic correlations in YNi $_{2}$ B $_{2}$ C using photoemission spectroscopy

Observation of the metallic mosaic phase in 1 $T$ -TaS $_{2}$ at equilibrium

Disorder-induced damping of spin excitations in Cr-doped BaFe $_{2}$ As $_{2}$

Field-induced ultrafast modulation of Rashba coupling at room temperature in ferroelectric $I^\pm$ -GeTe(111)

Inhibition of the photoinduced structural phase transition in the excitonic insulator Ta $_{2}$ NiSe $_{5}$

Suppression of stripe-ordered structural phases in monolayer IrTe $_{2}$ by a gold substrate

Role of a higher dimensional interaction in stabilizing charge density waves in quasi-1D NbSe $_{3}$ revealed by angle-resolved photoemission spectroscopy

Precursor phase with full phonon softening above the charge-density-wave phase transition in $2 H$ -TaSe $_{2}$

Break of symmetry at the surface of IrTe $_{2}$ upon phase transition measured by X-ray photoelectron diffraction

Anisotropic magnetic excitations and incipient NÃ©el order in Ba(Fe $_{1 - x}$ Mn $_{x}$ ) $_{2}$ As $_{2}$

Incoherent electronic band states in Mn-substituted BaFe $_{2}$ As $_{2}$

Mott versus hybridization gap in the low-temperature phase of $1 T$ -TaS $_{2}$

Electron-lattice interactions strongly renormalize the charge transfer energy in the spin-chain cuprate Li $_{2}$ CuO $_{2}$

Scanning tunneling microscopy at multiple voltage biases of stable "ring-like" Ag clusters on Si(111)-(7 $\times$ 7)

Electron-momentum dependence of electron-phonon coupling underlies dramatic phonon renormalization in YNi $_{2}$ B $_{2}$ C