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TT: Fachverband Tiefe Temperaturen

TT 6: Topological Semimetals

TT 6.6: Talk

Monday, March 27, 2023, 10:45–11:00, HSZ 304

Static and dynamic magnetic properties of RAlSi Weyl semimetals — •Tillmann Weinhold¹, Hank Wu^2,3, Rajib Sarkar¹, George Gill², Vadim Grinenko⁴, Fazel Tafti⁵, Stephen Blundell², and Hans-Henning Klauß¹ — ¹TU Dresden, Germany — ²University of Oxford — ³MPI for Solid State Research, Stuttgart, Germany — ⁴Shanghai JiaoTong University, China — ⁵Boston College, MA, USA

Weyl semimetals show interesting electronic transport behavior like anomalous Hall effect and negative magnetoresistance. In the magnetic semimetal NdAlSi spin-density wave order was found below 7.2 K. It is proposed that the magnetic order is driven by RKKY interaction of Weyl fermions on narrow Fermi pockets.

We used NMR and µSR experiments to gain information about local static and dynamic magnetic properties of NdAlSi and discuss the results in comparison with diamagnetic LaAlSi and canted ferromagnetic CeAlSi.