講演情報
[22p-P09-5]First-principles study of anomalous valley Hall effect in WTe2/CrI3 van der Waals heterostructures
〇(M2)Syifa FauziaHariyanti Putri1, Naoya Yamuguchi2, Fumiyuki Ishii2 (1.Grad. Sch. Of Sci. & Tech., 2.NanoMari)
キーワード：
van der Waals heterostructures、valley splitting、anomalous Hall conductivity
Valley is additional degree of freedom of electrons, which has attracted attention due to potential application in n ovel devices. Such realization can be done by the manipulation of valley-polarized carriers. Monolayer (ML) WTe2 has strong spin-orbit coupling, degenerate valleys in K and -K points, and preserved time reversal symmetry. However, stacking with ferromagnetic ML CrI3 could break this symmetry due to induced magnetic moment in ML WTe2 so non-zero anomalous Hall conductivity (AHC) emerges. In this study, we constructed different stacking configuration of WTe2/CrI3 and showed that AHC and valley splitting depend on the stacking configuration. We further evaluated the effect of interlayer sliding on the characteristic of AHC and valley splitting. Based on this study, we expected the interlayer sliding effect could provide an alternative direction to realize anomalous valley Hall effect in heterostructures system.