Berlin 2024 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 80: Correlated Electrons: Poster
TT 80.8: Poster
Donnerstag, 21. März 2024, 15:00–18:00, Poster E
Electric Field Gradient influenced by Rare Earth Elements in RAlSi Weyl Semimetals — •Tillmann Weinhold1, Hank Wu2, Rajib Sarkar1, Vadim Grinenko3, Fazel Tafti4, Stephen Blundell2, and Hans-Henning Klauss1 — 1TU Dresden, Germany — 2University of Oxford, Great Britain — 3Shanghai JiaoTong University, China — 4Boston College, MA, USA
Weyl semimetals exhibit topologically non-trivial band-structures with Weyl nodes that can host massless fermionic quasiparticles (Weyl fermions). These can give rise to exotic electronic properties such as anomalous Hall effect and a chiral anomaly in the transverse magnetoresistance.
We used NMR and µSR experiments to gain information about local static and dynamic magnetic properties of RAlSi (R = {La, Ce, Nd}). Surprisingly, we observe an Electric Field Gradient (EFG) at the Al position, which is dependent on the rare earth element present in the compound. The EFG is most pronounced for NdAlSi and vanishes for LaAlSi.
Keywords: NMR; RAlSi; Weyl-Semimetal; Electric Field Gradient; EFG