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Publications (26)

cond-mat.str-el2026

Uniaxial-Stress-Induced Magnetic Transitions in the Triangular-Lattice Antiferromagnet PdCrO2

Nina Stilkerich, Tobias Ritschel, Hilary M. L. Noad +10

Uniaxial stress is a promising method to tune magnetic frustration, allowing its effects to be studied in a precise way. In this work, uniaxial stress is applied to the triangular-…

cond-mat.str-el2021

Hidden Charge Order in an Iron Oxide Square-Lattice Compound

Jung-Hwa Kim, Darren C. Peets, Manfred Reehuis +14

Since the discovery of charge disproportionation in the FeO $_{2}$ square-lattice compound Sr $_{3}$ Fe $_{2}$ O $_{7}$ by MÃ¶ssbauer spectroscopy more than fifty years ago, the spatial ordering…

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-el2013

Formation of the coherent heavy fermion liquid at the 'hidden order' transition in URu2Si2

Shouvik Chatterjee, Jan Trinckauf, Torben Hanke +6

In this article we present high-resolution angle-resolved photoemission (ARPES) spectra of the heavy-fermion superconductor URu $_{2}$ Si $_{2}$ . Measurements as a function of both excita…

cond-mat.mtrl-sci2013

Experimental evidence for the coupling of Li-motion and structural distortions in LiMnPO $_{4}$

Christian Rudisch, Hans-Joachim Grafe, Jochen Geck +5

We present a detailed $^{7}$ Li- and $^{31}$ P-NMR study on single crystalline LiMnPO $_{4}$ in the paramagnetic and antiferromagnetic phase (AFM, $T_{N} \sim$ 34 K). This allows us to dete…

cond-mat.str-el2025

Field-induced magnetic phases in the Kitaev candidate Na $_{3}$ Co $_{2}$ SbO $_{6}$

Kranthi Kumar Bestha, Manaswini Sahoo, NiccolÃ² Francini +14

We report a rich anisotropic magnetic phase diagram of Na $_{3}$ Co $_{2}$ SbO $_{6}$ , a previously proposed cobaltate Kitaev candidate, based on field- and temperature-dependent magnetizatio…

cond-mat.str-el2025

Strain-control of electronic superlattice domains in CsV $_{3}$ Sb $_{5}$

Elaheh Sadrollahi, JoÃ£o Almeida Mendes, Nina Stilkerich +5

The kagome metals AV $_{3}$ Sb $_{5}$ (A = K, Rb, Cs) provide a unique platform to investigate the physics of interacting electrons, a central challenge in condensed matter physics. A…

cond-mat.supr-con2010

Phase diagram of charge order in La1.8-xEu0.2SrxCuO4 from resonant soft x-ray diffraction

JÃ¶rg Fink, Victor Soltwisch, Jochen Geck +3

Resonant soft x-ray scattering experiments with photon energies near the O K and the Cu L3 edge on the system La1.8-xEu0.2SrxCuO4 for 0.1 <= x <= 0.15 are presented. A phase diagra…

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.supr-con2006

Dressing of the charge carriers in high-Tc superconductors

Joerg Fink, Sergey Borisenko, Alexander Kordyuk +6

In this contribution we review recent ARPES results on the dressing of the charge carriers in high-temperature superconductors. After an introduction into the cuprates and their el…

cond-mat.str-el2022

Pressure-tuning of $I^\pm$ -RuCl $_{3}$ towards the ideal Kitaev-limit

Quirin Stahl, Tobias Ritschel, Gaston Garbarino +4

We report the discovery of an intriguing pressure-driven phase transformation in the layered Kitaev-material $I^\pm$ -RuCl $_{3}$ . By analyzing both the Bragg scattering as well as the di…

cond-mat.str-el2017

The effect of different in-chain impurities on the magnetic properties of the spin chain compound SrCuO $_{2}$ probed by NMR

Yannic Utz, Franziska Hammerath, Roberto Kraus +14

The S=1/2 Heisenberg spin chain compound SrCuO2 doped with different amounts of nickel (Ni), palladium (Pd), zinc (Zn) and cobalt (Co) has been studied by means of Cu nuclear magne…

cond-mat.str-el2018

Disrupted orbital order and the pseudo-gap in layered 1T-TaS $_{2}$

Tobias Ritschel, Helmuth Berger, Jochen Geck

We present a state-of-the-art density functional theory (DFT) study which models crucial features of the partially disordered orbital order stacking in the prototypical layered tra…

cond-mat.str-el2026

Direct High-Magnetic-Field Coupling to Stripe Order in a Cuprate Superconductor

Leonardo Martinelli, Izabela BiaÅo, Jens Oppliger +47

Superconductivity in cuprates emerges out of a complex normal state that hosts density waves, pseudogap physics, and strange metal properties. Here, we access this normal state by…

cond-mat.str-el2025

Disentangling the unusual magnetic anisotropy of the near-room-temperature ferromagnet Fe $_{4}$ GeTe $_{2}$

Riju Pal, Joyal J. Abraham, Alexander Mistonov +9

In the quest for two-dimensional conducting materials with high ferromagnetic ordering temperature the new family of the layered Fe $_{n}$ GeTe $_{2}$ compounds, especially the near-r…

cond-mat.str-el2022

Incommensurate and multiple- $q$ magnetic misfit order in the frustrated quantum-spin-ladder material antlerite, Cu $_{3}$ SO $_{4}$ (OH) $_{4}$

Anton A. Kulbakov, Elaheh Sadrollahi, Florian Rasch +15

In frustrated magnetic systems, the competition amongst interactions can introduce extremely high degeneracy and prevent the system from readily selecting a unique ground state. In…

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.mtrl-sci2026

Uniaxial strain-driven ferroelastic domain control in LaAlO3

Matthias Roeper, Robin Buschbeck, Jakob Wetzel +15

Multiferroic domain walls in functional oxides exhibit properties distinct from the bulk and are increasingly exploited as active elements in nanoelectronic and photonic devices. D…

cond-mat.str-el2020

Collapse of layer dimerization in the photo-induced hidden state of 1T-TaS2

Quirin Stahl, Maximilian Kusch, Florian Heinsch +6

Photo-induced switching between collective quantum states of matter is a fascinating rising field with exciting opportunities for novel technologies. Presently very intensively stu…

cond-mat.str-el2023

Sweet spot in the RuCl $_{3}$ magnetic system: nearly ideal $j_{eff} = 1/2$ moments and maximized $K / J$ ratio under pressure

Pritam Bhattacharyya, Liviu Hozoi, Quirin Stahl +2

Maximizing the ratio between Kitaev and residual Heisenberg interactions is a major goal in nowadays research on Kitaev-Heisenberg quantum magnets. Here we investigate Kitaev-Heise…

cond-mat.str-el2023

Orbital-selective time-domain signature of nematicity dynamics in the charge-density-wave phase of La $_{1.65}$ Eu $_{0.2}$ Sr $_{0.15}$ CuO $_{4}$

Martin Bluschke, Naman K. Gupta, Hoyoung Jang +23

Understanding the interplay between charge, nematic, and structural ordering tendencies in cuprate superconductors is critical to unraveling their complex phase diagram. Using pump…

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-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-el2022

Coupled frustrated ferromagnetic and antiferromagnetic quantum spin chains in the quasi-one-dimensional mineral antlerite, Cu $_{3}$ SO $_{4}$ (OH) $_{4}$

Anton A. Kulbakov, Denys Y. Kononenko, Satoshi Nishimoto +14

Magnetic frustration, the competition among exchange interactions, often leads to novel magnetic ground states with unique physical properties which can hinge on details of interac…

cond-mat.mes-hall2020

Fermi surface chirality induced in a TaSe $_{2}$ monosheet formed by a Ta/ Bi $_{2}$ Se $_{3}$ interface reaction

Andrey Polyakov, Katayoon Mohseni, Roberto Felici +9

Spin-momentum locking in topological insulators and materials with Rashba-type interactions is an extremely attractive feature for novel spintronic devices and is therefore under i…

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…

Publications (26)

Uniaxial-Stress-Induced Magnetic Transitions in the Triangular-Lattice Antiferromagnet PdCrO2

Hidden Charge Order in an Iron Oxide Square-Lattice Compound

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

Formation of the coherent heavy fermion liquid at the 'hidden order' transition in URu2Si2

Experimental evidence for the coupling of Li-motion and structural distortions in LiMnPO4​

Field-induced magnetic phases in the Kitaev candidate Na3​Co2​SbO6​

Strain-control of electronic superlattice domains in CsV3​Sb5​

Phase diagram of charge order in La1.8-xEu0.2SrxCuO4 from resonant soft x-ray diffraction

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

Dressing of the charge carriers in high-Tc superconductors

Pressure-tuning of I^±-RuCl3​ towards the ideal Kitaev-limit

The effect of different in-chain impurities on the magnetic properties of the spin chain compound SrCuO2​ probed by NMR

Disrupted orbital order and the pseudo-gap in layered 1T-TaS2​

Direct High-Magnetic-Field Coupling to Stripe Order in a Cuprate Superconductor

Disentangling the unusual magnetic anisotropy of the near-room-temperature ferromagnet Fe4​GeTe2​

Incommensurate and multiple-q magnetic misfit order in the frustrated quantum-spin-ladder material antlerite, Cu3​SO4​(OH)4​

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

Uniaxial strain-driven ferroelastic domain control in LaAlO3

Collapse of layer dimerization in the photo-induced hidden state of 1T-TaS2

Sweet spot in the RuCl3​ magnetic system: nearly ideal jeff​=1/2 moments and maximized K/J ratio under pressure

Orbital-selective time-domain signature of nematicity dynamics in the charge-density-wave phase of La1.65​Eu0.2​Sr0.15​CuO4​

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

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

Coupled frustrated ferromagnetic and antiferromagnetic quantum spin chains in the quasi-one-dimensional mineral antlerite, Cu3​SO4​(OH)4​

Fermi surface chirality induced in a TaSe2​ monosheet formed by a Ta/ Bi2​Se3​ interface reaction

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

Experimental evidence for the coupling of Li-motion and structural distortions in LiMnPO $_{4}$

Field-induced magnetic phases in the Kitaev candidate Na $_{3}$ Co $_{2}$ SbO $_{6}$

Strain-control of electronic superlattice domains in CsV $_{3}$ Sb $_{5}$

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

Pressure-tuning of $I^\pm$ -RuCl $_{3}$ towards the ideal Kitaev-limit

The effect of different in-chain impurities on the magnetic properties of the spin chain compound SrCuO $_{2}$ probed by NMR

Disrupted orbital order and the pseudo-gap in layered 1T-TaS $_{2}$

Disentangling the unusual magnetic anisotropy of the near-room-temperature ferromagnet Fe $_{4}$ GeTe $_{2}$

Incommensurate and multiple- $q$ magnetic misfit order in the frustrated quantum-spin-ladder material antlerite, Cu $_{3}$ SO $_{4}$ (OH) $_{4}$

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

Sweet spot in the RuCl $_{3}$ magnetic system: nearly ideal $j_{eff} = 1/2$ moments and maximized $K / J$ ratio under pressure

Orbital-selective time-domain signature of nematicity dynamics in the charge-density-wave phase of La $_{1.65}$ Eu $_{0.2}$ Sr $_{0.15}$ CuO $_{4}$

Coupled frustrated ferromagnetic and antiferromagnetic quantum spin chains in the quasi-one-dimensional mineral antlerite, Cu $_{3}$ SO $_{4}$ (OH) $_{4}$

Fermi surface chirality induced in a TaSe $_{2}$ monosheet formed by a Ta/ Bi $_{2}$ Se $_{3}$ interface reaction