Observation of charge to spin conversion in Weyl semimetal WTe2 at room temperature
Artikel i vetenskaplig tidskrift, 2020

The discovery of topological Weyl semimetals has revealed opportunities to realize several extraordinary physical phenomena in condensed matter physics. Specifically, Weyl semimetals with strong spin-orbit coupling, broken inversion symmetry, and novel spin textures are predicted to exhibit a large spin Hall effect that can efficiently convert the charge current to a spin current. Here, we report a direct experimental observation of large spin Hall and inverse spin Hall effects in the Weyl semimetal WTe2 at room temperature obeying the Onsager reciprocity relation. We demonstrate the detection of a pure spin current generated by the spin Hall phenomenon in WTe2 by making a van der Waals heterostructure with graphene, taking advantage of its long spin coherence length and spin transmission at the heterostructure interface. These experimental findings, well supported by ab initio calculations, show a large charge-spin conversion efficiency in WTe2, which can pave the way for the utilization of spin-orbit-induced phenomena in spintronic memory and logic circuit architectures.

Författare

Bing Zhao

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Dmitrii Khokhriakov

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Yang Zhang

Max-Planck-Gesellschaft

Huixia Fu

Weizmann Institute of Science

Bogdan Karpiak

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Xiaoguang Xu

Beijing University of Technology

Yong Jiang

Beijing University of Technology

Binghai Yan

Weizmann Institute of Science

Saroj Prasad Dash

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Anamul Md Hoque

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

PHYSICAL REVIEW RESEARCH

2643-1564 (eISSN)

Vol. 2 1 013286

Ämneskategorier

Annan fysik

Teoretisk kemi

Den kondenserade materiens fysik

DOI

10.1103/PhysRevResearch.2.013286

Mer information

Senast uppdaterat

2021-01-27