368 citations · 1.5k across the 37 of their papers we have counts for
36 papers
Autonomous Diffractometry Enabled by Visual Reinforcement Learning
J. Oppliger, M. Stifter, A. Rüegg +7
Automation underpins progress across scientific and industrial disciplines. Yet, automating tasks requiring interpretation of abstract visual information remain challenging. For ex…
Orbital Separation of Charge Order and Superconductivity in LaSrCuO
I. Biało, O. Gerguri, L. Martinelli +12
We report a combined x-ray absorption (XAS) and oxygen -edge resonant inelastic x-ray scattering (RIXS) study of charge order in underdoped LaSrCuO () u…
Magnetic Excitations of a Half-Filled Tl-based Cuprate
I. Biało, Q. Wang, J. Küspert +21
Strong electron correlations drive Mott insulator transitions. Yet, there exists no framework to classify Mott insulators by their degree of correlation. Cuprate superconductors, w…
Decoupling of Static and Dynamic Charge Correlations revealed by Uniaxial Strain in a Cuprate Superconductor
L. Martinelli, I. Biało, X. Hong +17
We use uniaxial strain in combination with ultra-high-resolution Resonant Inelastic X-ray Scattering (RIXS) at the oxygen K- and copper L3-edges to study the excitations stemming f…
Spin fluctuations sufficient to mediate superconductivity in nickelates
Paul Worm, Qisi Wang, Motoharu Kitatani +12
Infinite-layer nickelates show high-temperature superconductivity, and the experimental phase diagram agrees well with the one simulated within the dynamical vertex approximation (…
Exchange renormalized crystal field excitation in a quantum Ising magnet KTmSe
Shiyi Zheng, Hongliang Wo, Yiqing Gu +8
Rare-earth delafossite compounds, ARCh (A = alkali or monovalent ion, R = rare earth, Ch = chalcogen), have been proposed for a range of novel quantum phenomena. Particularly,…
Strain-Tuned Magnetic Frustration in a Square Lattice - Material
I. Biało, L. Martinelli, G. De Luca +16
Magnetic frustration is a route that can lead to the emergence of novel ground states, including spin liquids and spin ices. Such frustration can be introduced through either the g…
Spin Fluctuations in SrLaRuO
Zheng He, Qisi Wang, Yu Feng +12
We use inelastic neutron scattering to study spin fluctuations in SrLaRuO, where Lanthanum doping triggers a Lifshitz transition by pushing the van Hove singula…
Two Distinct Charge Orders in Infinite-layer PrNiO2+δ revealed by Resonant X-ray Diffraction
Xiaolin Ren, Ronny Sutarto, Qiang Gao +9
A broken translation symmetry has recently been revealed in infinite-layer nickelates, which has piqued considerable interest in its origin and relation to superconductivity, as we…
Magnetic Excitations in Strained Infinite-layer Nickelate PrNiO2
Qiang Gao, Shiyu Fan, Qisi Wang +16
Strongly correlated materials often respond sensitively to the external perturbations. In the recently discovered superconducting infinite-layer nickelates, the superconducting tra…
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…
Frustrated magnetic interactions in FeSe
Yiqing Gu, Qisi Wang, Hongliang Wo +7
The structurally simplest high-temperature superconductor FeSe exhibits an intriguing superconducting nematic paramagnetic phase with unusual spin excitation spectra that are diffe…
Pseudogap Suppression by Competition with Superconductivity in La-Based Cuprates
J. Küspert, R. Cohn Wagner, C. Lin +23
We have carried out a comprehensive high-resolution angle-resolved photoemission spectroscopy (ARPES) study of the pseudogap interplay with superconductivity in La-based cuprates.…
Anomalous contribution to the nematic electronic states from the structural transition in FeSe revealed by time- and angle-resolved photoemission spectroscopy
Yuanyuan Yang, Qisi Wang, Shaofeng Duan +8
High-resolution time- and angle-resolved photoemission measurements were made on FeSe superconductors. With ultrafast photoexcitation, two critical excitation fluences that corresp…
Fate of charge order in overdoped La-based cuprates
K. von Arx, Qisi Wang, S. Mustafi +18
In high-temperature cuprate superconductors, stripe order refers broadly to a coupled spin and charge modulation with a commensuration of eight and four lattice units, respectively…
Unusual band splitting and superconducting gap evolution with sulfur substitution in FeSe
Yuanyuan Yang, Qisi Wang, Shaofeng Duan +7
High-resolution angle-resolved photoemission measurements were taken on FeSeS (x=0, 0.04, and 0.08) superconductors. With an ultrahigh energy resolution of 0.4 meV, unu…
Uniaxial Pressure Induced Stripe Order Rotation in LaSrCuO
Qisi Wang, K. von Arx, D. G. Mazzone +19
Static stripe order is detrimental to superconductivity. Yet, it has been proposed that transverse stripe fluctuations may enhance the inter-stripe Josephson coupling and thus prom…
Resonant Soft X-Ray Scattering on LaPtSi
Deepak John Mukkattukavil, Johan Hellsvik, Anirudha Ghosh +15
X-ray absorption (XAS) and Resonant Inelastic X-ray Scattering (RIXS) spectra of LaPtSi single crystal at the Si L and La N edges are presented. The data are interpreted in…
Crystal Symmetry of Stripe Ordered La1.88Sr0.12CuO4
Ruggero Frison, Julia Kuespert, Qisi Wang +12
We present a combined x-ray and neutron diffraction study of the stripe ordered superconductor \lscox{0.12}. The average crystal structure is consistent with the orthorhombic $Bmab…
Charge Order Lock-in by Electron-Phonon Coupling in LaEuSrCuO
Qisi Wang, K. von Arx, M. Horio +11
We report an ultrahigh resolution resonant inelastic x-ray scattering (RIXS) study of the in-plane bond-stretching phonon mode in stripe-ordered cuprate LaEuSr$_{…
Field-Tuned Quantum Effects in a Triangular-Lattice Ising Magnet
Yayuan Qin, Yao Shen, Changle Liu +19
We report thermodynamic and neutron scattering measurements of the triangular-lattice quantum Ising magnet TmMgGaO 4 in longitudinal magnetic fields. Our experiments reveal a quasi…
Evolution of spin excitations from bulk to monolayer FeSe
J. Pelliciari, S. Karakuzu, Q. Song +17
The discovery of enhanced superconductivity (SC) in FeSe films grown on SrTiO3 (FeSe/STO) has revitalized the field of Fe-based superconductors. In the ultrathin limit, the superco…
Disentangling Intertwined Quantum States in a Prototypical Cuprate Superconductor
J. Choi, Q. Wang, S. Jöhr +12
Spontaneous symmetry breaking constitutes a paradigmatic classification scheme of matter. However, broken symmetry also entails domain degeneracy that often impedes identification…
Oxide Fermi liquid universality revealed by electron spectroscopy
M. Horio, K. P. Kramer, Q. Wang +27
We present a combined soft x-ray and high-resolution vacuum-ultraviolet angle-resolved photoemission spectroscopy study of the electron-overdoped cuprate PrLaCe$_…