Theoretical and experimental studies of spin polarized carbon doped Bi2Se3

Xin, Xiaojun1,2; Guo, Chunsheng2; Pang, Rui3,4; Zhang, Min5; Shi, Xingqiang6; Yang, Xinsheng1; Zhao, Yong1

2019-07-22

10.1063/1.5110182

APPLIED PHYSICS LETTERS   影响因子和分区

0003-6951

1077-3118

Carbon doped into Bi2Se3 as substitution for Se was reported inducing simultaneous magnetic and hole doping. In this work, based on theoretical and experimental approaches, we find that carbon doped Bi2Se3 is indeed spin polarized, while the magnetic moments are small and hole doping is little. Most carbon atoms energetically favor to be dimer- and trimer-substitutions for Se which induce neither magnetism nor charge doping. A few isolated carbon atoms doped at interstitial sites in the vdW gap or at Se vacancies result in spontaneous spin polarization and charge doping. The diffusion of a single carbon dopant into Bi2Se3 is difficult, while if dopants are close, carbon clusters can easily form, which means that the isolated, pairwise, and trimeric carbon dopants should coexist. These studies suggest that to obtain strong ferromagnetic C-Bi2Se3, experiments need careful design to dope single carbon atoms into bulk dispersedly.

SCI ; EI

英语

NI论文

其他

National Key Research and Development Plan[2017YFE0301306]

Physics

Physics, Applied

WOS:000477625500023

AMER INST PHYSICS

20193107247968

Atoms ; Dimers ; Magnetic moments ; Selenium ; Spin polarization ; Van der Waals forces

Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Magnetism: Basic Concepts and Phenomena:701.2 ; Organic Polymers:815.1.1 ; Atomic and Molecular Physics:931.3 ; High Energy Physics:932.1

PHYSICS

Web of Science

1.Southwest Jiaotong Univ, Key Lab Magnet Levitat Technol & Maglev Trains, Minist Educ, Superconduct & New Energy R&D Ctr, Mail Stop 165, Chengdu 610031, Sichuan, Peoples R China
2.Southwest Jiaotong Univ, Key Lab Adv Technol Mat, Minist Educ, Superconduct & New Energy R&D Ctr, Mail Stop 165, Chengdu 610031, Sichuan, Peoples R China
3.Zhengzhou Univ, Int Lab Quantum Funct Mat Henan, Zhengzhou 450001, Henan, Peoples R China
4.Zhengzhou Univ, Sch Phys & Engn, Zhengzhou 450001, Henan, Peoples R China
5.China West Normal Univ, Phys & Space Sci Sch, Nanchong 637002, Sichuan, Peoples R China
6.South Univ Sci & Technol China, Dept Phys, Shenzhen 518055, Peoples R China

Xin, Xiaojun,Guo, Chunsheng,Pang, Rui,et al. Theoretical and experimental studies of spin polarized carbon doped Bi2Se3[J]. APPLIED PHYSICS LETTERS,2019,115(4).

Xin, Xiaojun.,Guo, Chunsheng.,Pang, Rui.,Zhang, Min.,Shi, Xingqiang.,...&Zhao, Yong.(2019).Theoretical and experimental studies of spin polarized carbon doped Bi2Se3.APPLIED PHYSICS LETTERS,115(4).

Xin, Xiaojun,et al."Theoretical and experimental studies of spin polarized carbon doped Bi2Se3".APPLIED PHYSICS LETTERS 115.4(2019).