Proximity spin-orbit coupling in a small-diameter armchair carbon nanotube on monolayer bismuthene

被引：2
作者：
Kurpas M. [1 ]
机构：
[1] Institute of Physics, University of Silesia in Katowice, Chorzów
来源：
Physical Review B | 2023年 / 108卷 / 19期
关键词：
The authors thank M. Marganska-Lyzniak; M; Gmitra; Milivojević; and J. Fabian for fruitful discussions. The authors acknowledge support from the Interdisciplinary Centre for Mathematical and Computational Modelling (ICM); University of Warsaw (UW); under Grant No. GA84-43. The project is cofinanced by the National Center for Research and Development (NCBR) under the V4-Japan project BGapEng V4-JAPAN/2/46/BGapEng/2022;
D O I：
10.1103/PhysRevB.108.195408
中图分类号：
学科分类号：
摘要：
We study the spin-orbit proximity effects in a hybrid heterostructure built from a one-dimensional (1D) armchair carbon nanotube and two-dimensional (2D) buckled monolayer bismuthene. We show, by performing first-principles calculations, that Dirac electrons in the nanotube exhibit large spin-orbit coupling due to the close vicinity of bismuthene. The calculated low-energy band structure and the spin texture of the proximitized nanotube display a strong dependence on the position of the nanotube on the substrate, similar to the twist-angle dependence found in 2D heterostructures. Based on the first-principles results, we formulate an effective low-energy Hamiltonian of the nanotube, and we identify key interactions governing the proximity spin-orbit coupling. The proximity-induced spin splitting of Dirac cone bands is in the meV range, confirming an efficient transfer of spin-orbit coupling from bismuthene to the nanotube. © 2023 American Physical Society.
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