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TT: Fachverband Tiefe Temperaturen

TT 80: Correlated Electrons: Poster

TT 80.8: Poster

Thursday, March 21, 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