512 citations · 3.3k across the 79 of their papers we have counts for
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Interplay of Charge and Magnetic Orders in SmNiC 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 using diffuse and inelastic x-ray scattering together with Raman spectr…
Charge-density-wave quantum critical point under pressure in 2-TaSe
Yuliia Tymoshenko, Amir-Abbas Haghighirad, Rolf Heid +13
Suppressing of an ordered state that competes with superconductivity is one route to enhance superconducting transition temperatures. Whereas the effect of suppressing magnetic sta…
Evidence for reduced periodic lattice distortion within the Sb-terminated surface layer of the kagome metal CsVSb
Felix Kurtz, Gevin von Witte, Lukas Jehn +8
The discovery of the kagome metal CsVSb sparked broad interest, due to the coexistence of a charge density wave (CDW) phase and possible unconventional superconductivity in…
Chirality in the Kagome Metal CsVSb
H. J. Elmers, O. Tkach, Y. Lytvynenko +22
Using x-ray photoelectron diffraction (XPD) and angle-resolved photoemission spectroscopy, we study photoemission intensity changes related to changes in the geometric and electron…
Anomalous phonon Grüneisen parameters in semiconductor TaNiS
Mai Ye, Tom Lacmann, Mehdi Frachet +7
Strain tuning is a powerful experimental method in probing correlated electron systems. Here we study the strain response of the lattice dynamics and electronic structure in semico…
Paradigm for finding d-electron heavy fermions: the case of Cr-doped CsFeAs
Matteo Crispino, Pablo Villar Arribi, Anmol Shukla +8
We define a general strategy for finding new heavy-fermionic materials without rare-earth elements: doping a Hund metal with pronounced orbital-selective correlations towards half-…
Disentangling lattice and electronic instabilities in the excitonic insulator candidate TaNiSe by nonequilibrium spectroscopy
Kota Katsumi, Alexandr Alekhin, Sofia-Michaela Souliou +7
TaNiSe is an excitonic insulator candidate showing the semiconductor/semimetal-to-insulator (SI) transition below = 326 K. However, since a structural transi…
Precursor phase with full phonon softening above the charge-density-wave phase transition in -TaSe
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…
An Electronic Nematic Liquid in BaNiAs
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…
Elastoresistivity in the incommensurate charge density wave phase of BaNi(AsP)
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, BaNiAs has emerg…
Soft-phonon and charge-density-wave formation in nematic BaNiAs
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 BaNiAs, a candidate system for charge-driven electr…
Influence of the Pd-Si ratio on the valence transition in EuPdSi single crystals
Kristin Kliemt, Marius Peters, Isabel Reiser +9
Single crystals of intermediate valent EuPdSi were grown from an Eu-rich melt by the Bridgman as well as the Czochralski technique. The chemical and structural characteriza…
Signatures of a Quantum Griffiths Phase close to an Electronic Nematic Quantum Phase Transition
Pascal Reiss, David Graf, Amir A. Haghighirad +2
In the vicinity of a quantum critical point, quenched disorder can lead to a quantum Griffiths phase, accompanied by an exotic power-law scaling with a continuously varying dynamic…
Electronic correlations in the van der Waals ferromagnet FeGeTe revealed by its charge dynamics
M. Corasaniti, R. Yang, K. Sen +5
The layered van der Waals ferromagnetic FeGeTe harbours an unconventional interplay between topology and magnetism, leading to a large anomalous Hall conductivity at low te…
Dominant in-plane symmetric elastoresistance in CsFe2As2
P. Wiecki, A. -A. Haghighirad, F. Weber +3
We study the elastoresistance of the highly correlated material CsFe2As2 in all symmetry channels. Neutralizing its thermal expansion by means of a piezoelectric-based strain cell…
Band hybridisation at the semimetal-semiconductor transition of TaNiSe enabled by mirror-symmetry breaking
Matthew D. Watson, Igor Marković, Edgar Abarca Morales +4
We present a combined study from angle-resolved photoemission and density-functional theory calculations of the temperature-dependent electronic structure in the excitonic insulato…
Novel magnetism on a honeycomb lattice in a-RuCl3 studied by muon spin rotation
F. Lang, P. J. Baker, A. A. Haghighirad +4
Muon spin rotation measurements have been performed on a powder sample of a-RuCl3, a layered material which previously has been proposed to be a quantum magnet on a honeycomb latti…
The monoclinic crystal structure of -RuCl and the zigzag antiferromagnetic ground state
R. D. Johnson, S. Williams, A. A. Haghighirad +8
The layered honeycomb magnet alpha-RuCl3 has been proposed as a candidate to realize a Kitaev spin model with strongly frustrated, bond-dependent, anisotropic interactions between…
First-order structural transition in the multiferroic perovskite-like formate [(CH3)2NH2][Mn(HCOO)3]
M. Sanchez-Andujar, L. C. Gomez-Aguirre, B. Pato Doldan +9
In this work we explore the overall structural behaviour of the [(CH3)2NH2][Mn(HCOO)3] multiferroic compound across the temperature range where its ferroelectric transition takes p…
Structural variations and magnetic properties of the quantum antiferromagnets Cs2CuCl4-xBrx
Pham Thanh Cong, Bernd Wolf, Natalija van Well +4
Depending on the crystal growth conditions, an orthorhombic (O-type) or a tetragonal (T-type) structure can be found in the solid solution Cs2CuCl4-xBrx (0 < x < 4). Here we presen…
The stable phases of the Cs2CuCl4-xBrx mixed systems
N. Krüger, S. Belz, F. Schossau +6
Starting from Cs2CuCl4 and Cs2CuBr4 our project focuses on the growth of the Cs2CuCl4-xBrx mixed crystals from aqueous solution and the investigation of the occurring structural va…
Distinct magnetic regimes through site-selective atom substitution in the frustrated quantum antiferromagnet CsCuClBr
P. T. Cong, B. Wolf, M. de Souza +11
We report on a systematic study of the magnetic properties on single crystals of the solid solution CsCuClBr (0 x 4), which include the two known end-…