S. Souliou

activity

20132026

most citedGiant phonon anomalies and central peak due to charge density wave formation in YBa

_{2}

_{3}

_{6.6}

285 citations · 802 across the 29 of their papers we have counts for

collaborators

29 papers

cond-mat.str-el2026

Interplay of Charge and Magnetic Orders in SmNiC $_{2}$ Mediated by Electron-Phonon Interaction

A. von Ungern-Sternberg Schwark, A. -A. Haghighirad, R. Heid +11

We investigate the interplay between charge density wave (CDW) instabilities and ferromagnetism in SmNiC $_{2}$ using diffuse and inelastic x-ray scattering together with Raman spectr…

cond-mat.supr-con2025

Strain-induced structural change and nearly-commensurate diffuse scattering in the model high-temperature superconductor HgBa $_{2}$ CuO $_{4 + δ}$

Mai Ye, Wenshan Hong, Tom Lacmann +9

We investigate the strain response of underdoped HgBa $_{2}$ CuO $_{4 + δ}$ (Hg1201), by synchrotron X-ray diffraction and corresponding simulations of thermal diffuse scattering. The com…

cond-mat.supr-con2025

Soft Mode Origin of Charge Ordering in Superconducting Kagome CsV $_{3}$ Sb $_{5}$

Philippa Helen McGuinness, Fabian Henssler, Manex Alkorta +12

Charge-density-wave (CDW) order and superconductivity coexist in the kagome metals AV $_{3}$ Sb $_{5}$ (A=K, Cs, Rb), raising fundamental questions about the mechanisms driving their inte…

cond-mat.supr-con2025

Orbital Ordering in the Charge Density Wave Phases of BaNi $_{2}$ (As $_{1 - x}$ P $_{x}$ ) $_{2}$

Tom Lacmann, Robert Eder, Igor Vinograd +8

We use resonant X-ray scattering at the nickel L $_{2, 3}$ edges to investigate the interplay between orbital degrees of freedom and charge density waves (CDW) in the superconductor…

cond-mat.supr-con2025★ 1 cited

Charge density waves and soft phonon evolution in the superconductor BaNi $_{2}$ (As $_{1 - x}$ P $_{x}$ ) $_{2}$

Tom Lacmann, Sofia-Michaela Souliou, Fabian Henssler +8

The superconductor BaNi $_{2}$ As $_{2}$ exhibits a soft-phonon-driven, incommensurate charge density wave (I-CDW) which is accompanied by a small orthorhombic structural phase transition…

cond-mat.supr-con2025★ 1 cited

Resonant x-ray scattering study of charge-density wave correlations in YBa $_{2}$ Cu $_{3}$ O $_{6 + x}$ under uniaxial stress

S. Nakata, D. Betto, E. Schierle +13

We report a comprehensive study of the uniaxial stress response of charge-density-wave (CDW) correlations in detwinned single crystals of the high temperature superconductor YBa$_2…

cond-mat.supr-con2025★ 4 cited

Hybridization of lattice and charge order excitations in a superconducting cuprate

S. M. Souliou, D. Ishikawa, R. Heid +9

The ubiquitous tendency of superconducting cuprates to form charge density waves (CDWs) has reignited interest in the nature of their electron-phonon interaction and its role in sh…

cond-mat.mtrl-sci2023★ 1 cited

Doping-Induced Electronic and Structural Phase Transition in the Bulk Weyl Semimetal Mo1-xWxTe2

O. Fedchenko, F. K. Diekmann, P. Russmann +21

A comprehensive study of the electronic and structural phase transition from 1T` to Td in the bulk Weyl semimetal Mo1-xWxTe2 at different doping concentrations has been carried out…

cond-mat.supr-con2023★ 14 cited

Using strain to uncover the interplay between two- and three-dimensional charge density waves in high-temperature superconducting YBa $_{2}$ Cu $_{3}$ O $_{y}$

Igor Vinograd, Sofia Michaela Souliou, Amir-Abbas Haghighirad +14

Uniaxial pressure provides an efficient approach to control the competition between charge density waves (CDWs) and superconductivity in underdoped YBa $_{2}$ Cu $_{3}$ O $_{y}$ . I…

cond-mat.supr-con2023★ 6 cited

The high-pressure phase diagram of BaNi $_{2}$ As $_{2}$ : unconventional charge-density-waves and structural phase transitions

Tom Lacmann, Amir-Abbas Haghighirad, Sofia-Michaela Souliou +5

Structural phase transitions accompanied by incommensurate and commensurate charge density wave (CDW) modulations of unconventional nature have been reported in BaNi $_{2}$ As $_{2}$ , a n…

cond-mat.str-el2022★ 26 cited

Disentangling lattice and electronic instabilities in the excitonic insulator candidate Ta $_{2}$ NiSe $_{5}$ by nonequilibrium spectroscopy

Kota Katsumi, Alexandr Alekhin, Sofia-Michaela Souliou +7

Ta $_{2}$ NiSe $_{5}$ is an excitonic insulator candidate showing the semiconductor/semimetal-to-insulator (SI) transition below $T_{c}$ = 326 K. However, since a structural transi…

cond-mat.str-el2022★ 7 cited

Strong electron-phonon coupling and enhanced phonon Grüneisen parameters in valence-fluctuating metal EuPd $_{2}$ Si $_{2}$

Mai Ye, Mark Joachim Graf von Westarp, Sofia-Michaela Souliou +7

We study the valence crossover and strong electron-phonon coupling of EuPd $_{2}$ Si $_{2}$ by polarization-resolved Raman spectroscopy. The fully-symmetric phonon mode shows strongly asy…

cond-mat.str-el2022★ 33 cited

An Electronic Nematic Liquid in BaNi $_{2}$ As $_{2}$

Yi Yao, Roland Willa, Tom Lacmann +10

Understanding the organizing principles of interacting electrons and the emergence of novel electronic phases is a central endeavor of condensed matter physics. Electronic nematici…

cond-mat.str-el2022★ 28 cited

Elastoresistivity in the incommensurate charge density wave phase of BaNi $_{2}$ (As $_{1-x}$ P $_{x}$ ) $_{2}$

M. Frachet, P. W. Wiecki, T. Lacmann +7

Electronic nematicity, the breaking of the crystal lattice rotational symmetry by the electronic fluid, is a fascinating quantum state of matter. Recently, BaNi $_{2}$ As $_{2}$ has emerg…

cond-mat.str-el2022★ 27 cited

Soft-phonon and charge-density-wave formation in nematic BaNi $_{2}$ As $_{2}$

S. M. Souliou, T. Lacmann, R. Heid +7

We use diffuse and inelastic x-ray scattering to study the formation of an incommensurate charge-density-wave (I-CDW) in BaNi $_{2}$ As $_{2}$ , a candidate system for charge-driven electr…

cond-mat.str-el2021

Absence of temperature-dependent phonon anomalies in Sr2IrO4 and Sr3Ir2O7

K. Sen, R. Heid, S. M. Souliou +8

Following previous works reporting an anomalous behavior of several zone-center optical phonons across the magnetic transition of square lattice iridates Sr2IrO4 and Sr3Ir2O7, we h…

cond-mat.supr-con2021★ 7 cited

In-plane Isotropy of the Low Energy Phonon Anomalies in YBa $_{2}$ Cu $_{3}$ O $_{6 + x}$

Sofia-Michaela Souliou, Kaushik Sen, Rolf Heid +8

We study the temperature dependence of the low energy phonons in the $(H, 0, L)$ reciprocal plane of the highly ordered ortho-II YBa $_{2}$ Cu $_{3}$ O $_{6.55}$ cuprate high temperature su…

cond-mat.str-el2021★ 16 cited

Evidence for nesting driven charge density waves instabilities in a quasi-two-dimensional material: LaAgSb2

Alexeï Bosak, Sofia-Michaela Souliou, Clément Faugeras +6

Since their theoretical prediction by Peierls in the 30s, charge density waves (CDW) have been one of the most commonly encountered electronic phases in low dimensional metallic sy…

cond-mat.supr-con2020★ 9 cited

Inelastic X-ray scattering studies of phonon dispersions in superconductors at high pressures

S. M. Souliou, A. Bosak, G. Garbarino +1

Electron-phonon interaction is of central importance for the electrical and heat transport properties of metals, and is directly responsible for charge-density-waves or (convention…

cond-mat.mtrl-sci2019★ 10 cited

Lattice dynamics and phase stability of rhombohedral antimony under high pressure

Arianna Minelli, Sofia Michaela Souliou, Tra Nguyen-Thanh +6

The high pressure lattice dynamics of rhombohedral antimony have been studied by a combination of diffuse scattering and inelastic x-ray scattering. The evolution of the phonon beh…

cond-mat.supr-con2018★ 1 cited

Light-Induced Metastable State in Charge-Ordered YBa $_{2}$ Cu $_{3}$ O $_{6 + x}$

H. Gretarsson, S. M. Souliou, S. Jeong +6

We report temporal changes in Raman-scattering spectra of detwinned YBa $_{2}$ Cu $_{3}$ O $_{6 + x}$ single crystals under exposure to red laser light polarized along the crystallographic $a…

cond-mat.str-el2018★ 30 cited

Persistent low-energy phonon broadening near the charge order $q$ -vector in bilayer cuprate Bi $_{2}$ Sr $_{2}$ CaCu $_{2}$ O $_{8 + δ}$

Yu He, Shan Wu, Yu Song +23

We report a persistent low-energy phonon broadening around $q_{B} \sim 0.28$ r.l.u. along the Cu-O bond direction in the high- $T_{c}$ cuprate Bi $_{2}$ Sr $_{2}$ CaCu $_{2}$ O $_{8 + δ}$ (Bi-2212).…

cond-mat.supr-con2017★ 35 cited

Rapid Suppression of the Charge Density Wave in YBa $_{2}$ Cu $_{3}$ O $_{6.6}$ under Hydrostatic Pressure

S. M. Souliou, H. Gretarsson, G. Garbarino +4

We report on the effects of hydrostatic pressure (HP) on the charge density wave observed in underdoped cuprates. We studied YBa $_{2}$ Cu $_{3}$ O $_{6.6}$ ( $T_{c}$ =61 K) using high-resoluti…

cond-mat.str-el2017★ 77 cited

Raman scattering from Higgs mode oscillations in the two-dimensional antiferromagnet Ca $_{2}$ RuO $_{4}$

Sofia-Michaela Souliou, Jiří Chaloupka, Giniyat Khaliullin +5

We present and analyze Raman spectra of the Mott insulator Ca $_{2}$ RuO $_{4}$ , whose quasi-two-dimensional antiferromagnetic order has been described as a condensate of low-lying spin-o…

Interplay of Charge and Magnetic Orders in SmNiC2​ Mediated by Electron-Phonon Interaction

Strain-induced structural change and nearly-commensurate diffuse scattering in the model high-temperature superconductor HgBa2​CuO4+δ​

Soft Mode Origin of Charge Ordering in Superconducting Kagome CsV3​Sb5​

Orbital Ordering in the Charge Density Wave Phases of BaNi2​(As1−x​Px​)2​

Charge density waves and soft phonon evolution in the superconductor BaNi2​(As1−x​Px​)2​

Resonant x-ray scattering study of charge-density wave correlations in YBa2​Cu3​O6+x​ under uniaxial stress

Hybridization of lattice and charge order excitations in a superconducting cuprate

Doping-Induced Electronic and Structural Phase Transition in the Bulk Weyl Semimetal Mo1-xWxTe2

Using strain to uncover the interplay between two- and three-dimensional charge density waves in high-temperature superconducting YBa2​Cu3​Oy​

The high-pressure phase diagram of BaNi2​As2​: unconventional charge-density-waves and structural phase transitions

Disentangling lattice and electronic instabilities in the excitonic insulator candidate Ta2​NiSe5​ by nonequilibrium spectroscopy

Strong electron-phonon coupling and enhanced phonon Grüneisen parameters in valence-fluctuating metal EuPd2​Si2​

An Electronic Nematic Liquid in BaNi2​As2​

Elastoresistivity in the incommensurate charge density wave phase of BaNi2​(As1-x​Px​)2​

Soft-phonon and charge-density-wave formation in nematic BaNi2​As2​

Absence of temperature-dependent phonon anomalies in Sr2IrO4 and Sr3Ir2O7

In-plane Isotropy of the Low Energy Phonon Anomalies in YBa2​Cu3​O6+x​

Evidence for nesting driven charge density waves instabilities in a quasi-two-dimensional material: LaAgSb2

Inelastic X-ray scattering studies of phonon dispersions in superconductors at high pressures

Lattice dynamics and phase stability of rhombohedral antimony under high pressure

Light-Induced Metastable State in Charge-Ordered YBa2​Cu3​O6+x​

Persistent low-energy phonon broadening near the charge order q-vector in bilayer cuprate Bi2​Sr2​CaCu2​O8+δ​

Rapid Suppression of the Charge Density Wave in YBa2​Cu3​O6.6​ under Hydrostatic Pressure

Raman scattering from Higgs mode oscillations in the two-dimensional antiferromagnet Ca2​RuO4​

Interplay of Charge and Magnetic Orders in SmNiC $_{2}$ Mediated by Electron-Phonon Interaction

Strain-induced structural change and nearly-commensurate diffuse scattering in the model high-temperature superconductor HgBa $_{2}$ CuO $_{4 + δ}$

Soft Mode Origin of Charge Ordering in Superconducting Kagome CsV $_{3}$ Sb $_{5}$

Orbital Ordering in the Charge Density Wave Phases of BaNi $_{2}$ (As $_{1 - x}$ P $_{x}$ ) $_{2}$

Charge density waves and soft phonon evolution in the superconductor BaNi $_{2}$ (As $_{1 - x}$ P $_{x}$ ) $_{2}$

Resonant x-ray scattering study of charge-density wave correlations in YBa $_{2}$ Cu $_{3}$ O $_{6 + x}$ under uniaxial stress

Using strain to uncover the interplay between two- and three-dimensional charge density waves in high-temperature superconducting YBa $_{2}$ Cu $_{3}$ O $_{y}$

The high-pressure phase diagram of BaNi $_{2}$ As $_{2}$ : unconventional charge-density-waves and structural phase transitions

Disentangling lattice and electronic instabilities in the excitonic insulator candidate Ta $_{2}$ NiSe $_{5}$ by nonequilibrium spectroscopy

Strong electron-phonon coupling and enhanced phonon Grüneisen parameters in valence-fluctuating metal EuPd $_{2}$ Si $_{2}$

An Electronic Nematic Liquid in BaNi $_{2}$ As $_{2}$

Elastoresistivity in the incommensurate charge density wave phase of BaNi $_{2}$ (As $_{1-x}$ P $_{x}$ ) $_{2}$

Soft-phonon and charge-density-wave formation in nematic BaNi $_{2}$ As $_{2}$

In-plane Isotropy of the Low Energy Phonon Anomalies in YBa $_{2}$ Cu $_{3}$ O $_{6 + x}$

Light-Induced Metastable State in Charge-Ordered YBa $_{2}$ Cu $_{3}$ O $_{6 + x}$

Persistent low-energy phonon broadening near the charge order $q$ -vector in bilayer cuprate Bi $_{2}$ Sr $_{2}$ CaCu $_{2}$ O $_{8 + δ}$

Rapid Suppression of the Charge Density Wave in YBa $_{2}$ Cu $_{3}$ O $_{6.6}$ under Hydrostatic Pressure

Raman scattering from Higgs mode oscillations in the two-dimensional antiferromagnet Ca $_{2}$ RuO $_{4}$