Enhanced Berry Curvature Dipole and Persistent Spin Texture in the Bi(110) Monolayer
SCIE
SCOPUS
- Title
- Enhanced Berry Curvature Dipole and Persistent Spin Texture in the Bi(110) Monolayer
- Authors
- Jin, Kyung-Hwan; Oh, Eunseok; Stania, Roland; Liu, Feng; Yeom, Han Woong
- Date Issued
- 2021-11
- Publisher
- AMER CHEMICAL SOC
- Abstract
- 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://oasis.postech.ac.kr/handle/2014.oak/113245
- DOI
- 10.1021/acs.nanolett.1c02811
- ISSN
- 1530-6984
- Article Type
- Article
- Citation
- NANO LETTERS, vol. 21, no. 22, page. 9468 - 9475, 2021-11
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