Giant Rashba Spin Splitting in Sb/Bi2Se3/Sb and Sb/Sb2Te3 /Sb Heterojunctions

被引：0
作者：
Wenming Xue
Jin Li
Xiangyang Peng
Chaoyu He
Tao Ouyang
Xiang Qi
Chunxiao Zhang
Chaobo Luo
Jiao Deng
Qiong Peng
Sifan Zhang
Chao Tang
Jianxin Zhong
机构：
[1] Xiangtan University,School of Physics and Optoelectronics Engineering
[2] Hunan Institute of Science and Technology,School of Physics and Electrical Sciences
[3] Hengyang Normal University,Institution of Condensed Physics, College of Physics and Electronic Engineering
来源：
Journal of Electronic Materials | 2022年 / 51卷
关键词：
Heterojunction; spatial inversion symmetry; Rashba spin splitting;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Exploring semiconductor materials with huge Rashba spin splitting is of great significance for spintronic devices without a magnetic field. In this work, the structural and electronic properties of Sb/Bi2Se3/Sb (001) and Sb/Sb2Te3/Sb (001) heterojunctions were studied by first-principles calculations. Four different stacking heterojunctions with very small lattice mismatch were studied, and it was found that all of the heterojunctions were semiconductors with a band gap in the range of 0.05–0.2 eV. Interestingly, giant Rashba-type splitting (up to 5.2 eVÅ) near the Fermi level was induced in these heterojunctions due to the breaking of spatial inversion symmetry. Rashba splitting is mainly influenced by the pz orbital of Sb atoms, and the direction of the spin vectors near the Fermi level are all perpendicular to their momentum, and form two circles with opposite chirality. Because of the successful fabrication of Sb, Bi2Se3 and Sb2Te3, our discoveries provide promising candidates for overcoming the problems of small splitting and metallic Fermi surface in the current research of Rashba splitting for practical applications in spintronic devices.
引用
收藏
页码：5142 / 5149
页数：7
相关论文
共 330 条
  • [11] Liu W(2004)Strong Spin-Orbit Splitting on Bi Surfaces Phys. Rev. Lett. 93 021067-undefined
  • [12] Yang X(2012)Higher-Order Contributions to the Rashba-–Bychkov Effect with Application to the Bi/Ag(111) Surface Alloy Phys. Rev. B. 85 3419-undefined
  • [13] Arita M(2009)Quantitative Vectorial Spin Analysis in Angle-Resolved Photoemission: Bi∕Ag(111) and Pb∕Ag(111) Phys. Rev. B 79 1335-undefined
  • [14] Schwier E(2007)Giant Spin Splitting Through Surface Alloying Phys Rev Lett. 98 4-undefined
  • [15] Shimada K(2005)High-Resolution Photoemission onAg∕Au(111): Spin-Orbit Splitting and Electronic Localization of the Surface State Phys. Rev. B. 72 085325-undefined
  • [16] Jeschke H(2006)Interplay Between Structural, Chemical, and Spectroscopic Properties ofAg∕Au(111)Epitaxial Ultrathin Films: A Way to Tune the Rashba Coupling Phys. Rev. B. 73 1605407-undefined
  • [17] Thomale R(2015)Spin-Orbit Splitting of the Shockley Surface State on Cu(111) Phys. Rev. B. 87 2133-undefined
  • [18] Shi Y(2013)Strongly Spin-Orbit Coupled Two-Dimensional Electron Gas Emerging near the Surface of Polar Semiconductors Phys. Rev. Lett. 110 6425-undefined
  • [19] Wu X(2011)Origin of Giant Bulk Rashba Splitting: Application to BiTeI Phys. Rev. B. 84 201410(R)-undefined
  • [20] Xiao S(2015)Class of Rashba Ferroelectrics in Hexagonal Semiconductors Phys. Rev. B. 92 3098-undefined
12345678910