Publications (20)
Evidence for a field-induced Lifshitz transition in the Weyl semimetal CeAlSi
M. M. Piva, T. Helm, J. C. Souza +4
The Weyl semimetal CeAlSi crystallises in the noncentrosymmetric tetragonal space group and exhibits ferromagnetic order below 8 K, thereby breaking both spatial inversion…
Hot Hydride Superconductivity above 550 K
A. D. Grockowiak, M. Ahart, T. Helm +9
The search for room temperature superconductivity has accelerated dramatically in the last few years driven largely by theoretical predictions that first indicated alloying dense h…
Observation of two-dimensional Fermi surface and Dirac dispersion in YbMnSb
Robert Kealhofer, Sooyoung Jang, Sinéad M. Griffin +9
We present the crystal structure, electronic structure, and transport properties of the material YbMnSb, a candidate system for the investigation of Dirac physics in the presen…
Incommensurate two-dimensional checkerboard charge density wave in the low dimensional superconductor Ta4Pd3Te16
Zhenzhong Shi, S. J. Kuhn, F. Flicker +9
We report the observation of a two-dimensional (2D) checkerboard charge density wave (CDW) in the low-dimensional superconductor Ta4Pd3Te16. By determining its CDW properties acros…
Fermi Surface Evolution in an Electron-Doped High-Tc Superconductor Revealed by Magnetic Quantum Oscillations
T. Helm, M. V. Kartsovnik, M. Bartkowiak +5
We report on the direct probing of the Fermi surface in the bulk of the electron-doped superconductor NdCeCuO at different doping levels by means of magnetoresistan…
Experimental evidence for Zeeman spin-orbit coupling in layered antiferromagnetic conductors
R. Ramazashvili, P. D. Grigoriev, T. Helm +9
Most of solid-state spin physics arising from spin-orbit coupling, from fundamental phenomena to industrial applications, relies on symmetry-protected degeneracies. So does the Zee…