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JIN, Kyung-Hwan
원자제어 저차원 전자계 연구단
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Enhanced Berry Curvature Dipole and Persistent Spin Texture in the Bi(110) Monolayer

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Title
Enhanced Berry Curvature Dipole and Persistent Spin Texture in the Bi(110) Monolayer
Author(s)
Kyung-Hwan Jin; Eunseok Oh; Roland Stania; Liu, Feng; Han Woong Yeom
Publication Date
2021-11-24
Journal
Nano Letters, v.21, no.22, pp.9468 - 9475
Publisher
American Chemical Society
Abstract
© 2021 The Authors. Published by American Chemical Society.Nonvanishing Berry curvature dipole (BCD) and persistent spin texture (PST) are intriguing physical manifestations of electronic states in noncentrosymmetric 2D materials. The former induces a nonlinear Hall conductivity while the latter offers a coherent spin current. Based on density-functional-theory (DFT) calculations, we demonstrate the coexistence of both phenomena in a Bi(110) monolayer with a distorted phosphorene structure. Both effects are concurrently enhanced due to the strong spin-orbit coupling of Bi while the structural distortion creates internal in-plane ferroelectricity with inversion asymmetry. We further succeed in fabricating a Bi(110) monolayer in the desired phosphorene structure on the NbSe2 substrate. Detailed atomic and electronic structures of the Bi(110)/NbSe2 heterostructure are characterized by scanning tunneling microscopy/spectroscopy and angle-resolved-photoemission spectroscopy. These results are consistent with DFT calculations which indicate the large BCD and PST are retained. Our results suggest the Bi(110)/NbSe2 heterostructure as a promising platform to exploit nonlinear Hall and coherent spin transport properties together.
URI
https://pr.ibs.re.kr/handle/8788114/10927
DOI
10.1021/acs.nanolett.1c02811
ISSN
1530-6984
Appears in Collections:
Center for Artificial Low Dimensional Electronic Systems(원자제어 저차원 전자계 연구단) > 1. Journal Papers (저널논문)
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