Magnetoelectric tuning of spin, valley, and layer-resolved anomalous Nernst effect in transition-metal dichalcogenides bilayers

Yaser Hajati; Mohammad Alipourzadeh; Jamal Berakdar

doi:10.1088/1361-648X/accc65

Magnetoelectric tuning of spin, valley, and layer-resolved anomalous Nernst effect in transition-metal dichalcogenides bilayers

J Phys Condens Matter. 2023 Apr 21;35(28). doi: 10.1088/1361-648X/accc65.

Authors

Yaser Hajati^{1

2}, Mohammad Alipourzadeh², Jamal Berakdar¹

Affiliations

¹ Institut für Physik, Martin-Luther Universität Halle-Wittenberg, D-06099 Halle, Germany.
² Department of Physics, Faculty of Science, Shahid Chamran University of Ahvaz, 6135743135 Ahvaz, Iran.

PMID: 37044101
DOI: 10.1088/1361-648X/accc65

Abstract

The anomalous Nernst coefficient (ANC) for transition-metal dichalcogenide (TMD) bilayers is studied with a focus on the interplay between layer pseudospin, spin, and valley degrees of freedom when electric and exchange fields are present. Breaking the inversion and time reversal symmetries via respectively electric and exchange fields results for bilayer TMDs in a spin-valley-layer polarized total ANC. Conditions are determined for controlling the spin, valley, and layer-resolved contributions via electric field tuning. Our results demonstrate the control of layer degree of freedom in bilayer TMDs magnetoelectrically which is of relevance for possible applications in spin/valley caloritronics.

Keywords: Nernst effect; inversion symmetry; magnetoelectric; spin; time reversal symmetry; transition-metal dichacogenides bilayers; valleys.