44 citations · 97 across the 10 of their papers we have counts for
10 papers
From Narrow-gap Semiconductor to Metallic Altermagnet: Optical Fingerprints of Co-Doped FeSb2
R. Mathew Roy, M. Povolotskiy, J. Kirschke +11
The realization of bulk metallic altermagnetism has remained elusive despite the growing number of candidate materials. Here, we present evidence that moderate cobalt substitution…
Optical conductivity and band gap in the double-Weyl candidate SrSi2 at ambient pressure
L. Z. Maulana, A. A. Tsirlin, E. Uykur +4
We probe the possible double-Weyl state in cubic SrSi2 using optical spectroscopy. The complex optical conductivity was measured in a frequency range from 70 to 22 000 cm-1 at temp…
Interplay of - and -states in RbTiBi and CsTiBi flat-band kagome metals
M. Wenzel, E. Uykur, A. A. Tsirlin +4
Shifting the Fermi level of the celebrated (135) compounds into proximity of flat bands strongly enhances electronic correlations and severely affects the formation of de…
Interlayer charge transfer induced by electronic instabilities in the natural van der Waals hetrostructure 4H-TaS
R. Mathew Roy, X. Feng, M. Wenzel +6
The natural van der Waals heterostructure 4H-TaS composed of alternating 1T- and 1H-TaS layers serves as a platform for investigating the electronic correlations and la…
Fermi-liquid behavior of non-altermagnetic RuO
Maxim Wenzel, Ece Uykur, Sahana Rößler +5
Presence of magnetism in potentially altermagnetic RuO has been a subject of intense debate. Using broadband infrared spectroscopy combined with density-functional band-structu…
Phonon and magnon dynamics across antiferromagnetic transition in 2D layered van der Waals material CrSBr
E. Uykur, A. A. Tsirlin, F. Long +6
We report temperature-dependent reflectivity spectra of the layered van der Waals magnet CrSBr in the far-infrared region. Polarization-dependent measurements resolve the vibration…
Intriguing Low-Temperature Phase in the Antiferromagnetic Kagome Metal FeGe
M. Wenzel, E. Uykur, A. A. Tsirlin +7
The properties of kagome metals are governed by the interdependence of band topology and electronic correlations resulting in remarkably rich phase diagrams. Here, we study the tem…
Magneto-optical response of the Weyl semimetal NbAs: Experimental results and hyperbolic-band computations
S. Polatkan, E. Uykur, J. Wyzula +5
The magneto-optical properties of (001)-oriented NbAs single crystals have been studied in the spectral range from 5 to 150 meV and in magnetic fields of up to 13 T. A rich spectru…
Charge-density wave transition in magnetic topological semimetal EuAl
R. Yang, C. C. Le, P. Zhu +5
The interplay among topology, charge-density wave (CDW), and magnetism can give rise to a plethora of exotic quantum phenomena. Recently, a group of magnetic topological semimetals…
Exchange gap in GdPtBi probed by magneto-optics
S. Polatkan, E. Uykur, I. Mohelsky +6
We measured the magneto-reflectivity spectra (4 - 90 meV, 0 - 16 T) of the triple-point semimetal GdPtBi and found them to demonstrate two unusual broad features emerging in field.…