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Publications (20)

cond-mat.supr-con2024

Two-Dimensional Phase-Fluctuating Superconductivity in Bulk-Crystalline NdO $_{0.5}$ F $_{0.5}$ BiS $_{2}$

C. S. Chen, J. KÃ¼spert, I. BiaÅo +11

We present a combined growth and transport study of superconducting single-crystalline NdO $_{0.5}$ F $_{0.5}$ BiS $_{2}$ . Evidence of two-dimensional superconductivity with significant p…

cond-mat.supr-con2017

Damped spin excitations in a doped cuprate superconductor with orbital hybridization

O. Ivashko, N. E. Shaik, X. Lu +13

A resonant inelastic x-ray scattering (RIXS) study of overdamped spin-excitations in slightly underdoped La $_{2 - x}$ Sr $_{x}$ CuO $_{4}$ (LSCO) with $x = 0.12$ and $0.145$ is presented. Th…

cond-mat.supr-con2020

High-Temperature Charge-Stripe Correlations in La $_{1.675}$ Eu $_{0.2}$ Sr $_{0.125}$ CuO $_{4}$

Qisi Wang, M. Horio, K. von Arx +24

We use resonant inelastic x-ray scattering to investigate charge-stripe correlations in La $_{1.675}$ Eu $_{0.2}$ Sr $_{0.125}$ CuO $_{4}$ . By differentiating elastic from inelastic scatter…

cond-mat.str-el2025

Resonant Inelastic X-ray Scattering Study of Ca $_{3}$ Ru $_{2}$ O $_{7}$

K. von Arx, F. Forte, M. Horio +13

We present a combined oxygen $K$ -edge x-ray absorption spectroscopy (XAS) and resonant inelastic x-ray scattering (RIXS) study of the bilayer ruthenate Ca $_{3}$ Ru $_{2}$ O $_{7}$ . Our RIXS…

cond-mat.supr-con2020

Decoupling of Lattice and Orbital Degrees of Freedom in an Iron-Pnictide Superconductor

Christian E. Matt, O. Ivashko, M. Horio +16

The interplay of structural and electronic phases in iron-based superconductors is a central theme in the search for the superconducting pairing mechanism. While electronic nematic…

cond-mat.mtrl-sci2024

Successive ferroelectric orders and magnetoelectric coupling without long-range magnetic order in highly frustrated pyrochlore compounds: Sm $_{2}$ Ti $_{2 - x}$ V $_{x}$ O $_{7}$

S. Mukherjee, O. Ivashko, S. Majumdar +2

Sm $_{2}$ Ti $_{2}$ O $_{7}$ , a member of rare-earth titanate pyrochlores, exhibits dipolar-octupolar antiferromagnetism below $T_{N}$ = 0.35 K. We observed two ferroelectric transitions at 182…

cond-mat.supr-con2017

Charge-Stripe Order and Superconductivity in $I r_{1 - x} P t_{x} T e_{2}$

O. Ivashko, L. Yang, D. Destraz +14

A combined resistivity and hard x-ray diffraction study of superconductivity and charge ordering in $I r_{1 - x} P t_{x} T e_{2}$ , as a function of Pt substitution and externally app…

cond-mat.supr-con2025

Dynamic Competition between Cooper-Pair and Spin-Density-Wave Condensation

B. Decrausaz, M. Pikulski, O. Ivashko +13

Quantum matter phases may co-exist microscopically even when they display competing tendencies. A fundamental question is whether such a competition can be avoided through the elim…

cond-mat.str-el2024

Magnon interactions in a moderately correlated Mott insulator

Qisi Wang, S. Mustafi, E. Fogh +20

Quantum fluctuations in low-dimensional systems and near quantum phase transitions have significant influences on material properties. Yet, it is difficult to experimentally gauge…

cond-mat.str-el2020

Disentangling Intertwined Quantum States in a Prototypical Cuprate Superconductor

J. Choi, Q. Wang, S. JÃ¶hr +12

Spontaneous symmetry breaking constitutes a paradigmatic classification scheme of matter. However, broken symmetry also entails domain degeneracy that often impedes identification…

cond-mat.str-el2019

Pressure-Induced Rotational Symmetry Breaking in URu $_{2}$ Si $_{2}$

J. Choi, O. Ivashko, N. Dennler +8

Phase transitions and symmetry are intimately linked. Melting of ice, for example, restores translation invariance. The mysterious hidden order (HO) phase of URu $_{2}$ Si $_{2}$ has, des…

cond-mat.supr-con2020

Spatially Inhomogeneous Competition between Superconductivity and the Charge Density Wave in YBa $_{2}$ Cu $_{3}$ O $_{6.67}$

J. Choi, O. Ivashko, E. Blackburn +13

The charge density wave in the high-temperature superconductor YBa $_{2}$ Cu $_{3}$ O $_{7 - x}$ (YBCO) is now known to have two different ordering tendencies differentiated by their $c$ -axis…

cond-mat.str-el2019

Strain-Engineering Mott-Insulating La $_{2}$ CuO $_{4}$

O. Ivashko, M. Horio, W. Wan +15

The transition temperature $T_{c}$ of unconventional superconductivity is often tunable. For a monolayer of FeSe, for example, the sweet spot is uniquely bound to titanium-o…

cond-mat.str-el2018

Spin-Orbital Excitations in Ca $_{2}$ RuO $_{4}$ Revealed by Resonant Inelastic X-ray Scattering

L. Das, F. Forte, R. Fittipaldi +19

The strongly correlated insulator Ca $_{2}$ RuO $_{4}$ is considered as a paradigmatic realization of both spin-orbital physics and a band-Mott insulating phase, characterized by orbita…

cond-mat.supr-con2023

Designing the stripe-ordered cuprate phase diagram through uniaxial-stress

Z. Guguchia, D. Das, G. Simutis +23

The ability to efficiently control charge and spin in the cuprate high-temperature superconductors is crucial for fundamental research and underpins technological development. Here…

cond-mat.supr-con2015

Magnetic field controlled charge density wave coupling in underdoped YBa $_{2}$ Cu $_{3}$ O $_{6 + x}$

J. Chang, E. Blackburn, O. Ivashko +10

The application of large magnetic fields ( $B \sim B_{c 2}$ ) to layered cuprates suppresses their high temperature superconducting behaviour and reveals competing ground states. In t…

cond-mat.str-el2026

Strain-tunable charge localization coupled to complex magnetic orders in EuAl $_{4}$

M. Baumgartner, Xunyang Hong, Tianren Wang +19

Charge localization is particularly interesting when coupled to antiferromagnetic spin structures. Coupled spin-charge orders are well established in elemental chromium and correla…

cond-mat.supr-con2023

Charge order above room-temperature in a prototypical kagome superconductor La(Ru $_{1 - x}$ Fe $_{x}$ ) $_{3}$ Si $_{2}$

I. Plokhikh, C. Mielke, H. Nakamura +22

The kagome lattice is an intriguing and rich platform for discovering, tuning and understanding the diverse phases of quantum matter, which is a necessary premise for utilizing qua…

cond-mat.str-el2024

Engineering Phase Competition Between Stripe Order and Superconductivity in La $_{1.88}$ Sr $_{0.12}$ CuO $_{4}$

J. KÃ¼spert, I. BiaÅo, R. Frison +18

Unconventional superconductivity often couples to other electronic orders in a cooperative or competing fashion. Identifying external stimuli that tune between these two limits is…

physics.ins-det2022

In-situ uniaxial pressure cell for X-ray and neutron scattering experiments

G. Simutis, A. Bollhalder, M. Zolliker +18

We present an in-situ uniaxial pressure device optimized for small angle X-ray and neutron scattering experiments at low-temperatures and high magnetic fields. A stepper motor gene…

Publications (20)

Two-Dimensional Phase-Fluctuating Superconductivity in Bulk-Crystalline NdO0.5​F0.5​BiS2​

Damped spin excitations in a doped cuprate superconductor with orbital hybridization

High-Temperature Charge-Stripe Correlations in La1.675​Eu0.2​Sr0.125​CuO4​

Resonant Inelastic X-ray Scattering Study of Ca3​Ru2​O7​

Decoupling of Lattice and Orbital Degrees of Freedom in an Iron-Pnictide Superconductor

Successive ferroelectric orders and magnetoelectric coupling without long-range magnetic order in highly frustrated pyrochlore compounds: Sm2​Ti2−x​Vx​O7​

Charge-Stripe Order and Superconductivity in Ir1−x​Ptx​Te2​

Dynamic Competition between Cooper-Pair and Spin-Density-Wave Condensation

Magnon interactions in a moderately correlated Mott insulator

Disentangling Intertwined Quantum States in a Prototypical Cuprate Superconductor

Pressure-Induced Rotational Symmetry Breaking in URu2​Si2​

Spatially Inhomogeneous Competition between Superconductivity and the Charge Density Wave in YBa2​Cu3​O6.67​

Strain-Engineering Mott-Insulating La2​CuO4​

Spin-Orbital Excitations in Ca2​RuO4​ Revealed by Resonant Inelastic X-ray Scattering

Designing the stripe-ordered cuprate phase diagram through uniaxial-stress

Magnetic field controlled charge density wave coupling in underdoped YBa2​Cu3​O6+x​

Strain-tunable charge localization coupled to complex magnetic orders in EuAl4​

Charge order above room-temperature in a prototypical kagome superconductor La(Ru1−x​Fex​)3​Si2​

Engineering Phase Competition Between Stripe Order and Superconductivity in La1.88​Sr0.12​CuO4​

In-situ uniaxial pressure cell for X-ray and neutron scattering experiments

Two-Dimensional Phase-Fluctuating Superconductivity in Bulk-Crystalline NdO $_{0.5}$ F $_{0.5}$ BiS $_{2}$

High-Temperature Charge-Stripe Correlations in La $_{1.675}$ Eu $_{0.2}$ Sr $_{0.125}$ CuO $_{4}$

Resonant Inelastic X-ray Scattering Study of Ca $_{3}$ Ru $_{2}$ O $_{7}$

Successive ferroelectric orders and magnetoelectric coupling without long-range magnetic order in highly frustrated pyrochlore compounds: Sm $_{2}$ Ti $_{2 - x}$ V $_{x}$ O $_{7}$

Charge-Stripe Order and Superconductivity in $I r_{1 - x} P t_{x} T e_{2}$

Pressure-Induced Rotational Symmetry Breaking in URu $_{2}$ Si $_{2}$

Spatially Inhomogeneous Competition between Superconductivity and the Charge Density Wave in YBa $_{2}$ Cu $_{3}$ O $_{6.67}$

Strain-Engineering Mott-Insulating La $_{2}$ CuO $_{4}$

Spin-Orbital Excitations in Ca $_{2}$ RuO $_{4}$ Revealed by Resonant Inelastic X-ray Scattering

Magnetic field controlled charge density wave coupling in underdoped YBa $_{2}$ Cu $_{3}$ O $_{6 + x}$

Strain-tunable charge localization coupled to complex magnetic orders in EuAl $_{4}$

Charge order above room-temperature in a prototypical kagome superconductor La(Ru $_{1 - x}$ Fe $_{x}$ ) $_{3}$ Si $_{2}$

Engineering Phase Competition Between Stripe Order and Superconductivity in La $_{1.88}$ Sr $_{0.12}$ CuO $_{4}$