Impurity effect on surface states of Bi (111) ultrathin films

doi:10.1088/1674-1056/25/8/087303

中国物理B ›› 2016, Vol. 25 ›› Issue (8): 87303-087303.doi: 10.1088/1674-1056/25/8/087303

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

Impurity effect on surface states of Bi (111) ultrathin films

Kai Zhu(朱凯), Dai Tian(田岱), Lin Wu(伍琳), Jianli Xu(许建丽), Xiaofeng Jin(金晓峰)

1 State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai 200433, China;
2 Collaborative Innovation Center of Advanced Microstructures, Fudan University, Shanghai 200433, China

收稿日期:2016-05-26 修回日期:2016-05-31 出版日期:2016-08-05 发布日期:2016-08-05
通讯作者: Xiaofeng Jin E-mail:xfjin@fudan.edu.cn
基金资助:
Project supported by the National Basic Research Program of China (Grants Nos. 2015CB921400 and 2011CB921802) and the National Natural Science Foundation of China (Grants Nos. 11374057, 11434003, and 11421404).

Impurity effect on surface states of Bi (111) ultrathin films

Kai Zhu(朱凯)^1,2, Dai Tian(田岱)^1,2, Lin Wu(伍琳)^1,2, Jianli Xu(许建丽)^1,2, Xiaofeng Jin(金晓峰)^1,2

1 State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai 200433, China;
2 Collaborative Innovation Center of Advanced Microstructures, Fudan University, Shanghai 200433, China

Received:2016-05-26 Revised:2016-05-31 Online:2016-08-05 Published:2016-08-05
Contact: Xiaofeng Jin E-mail:xfjin@fudan.edu.cn
Supported by:
Project supported by the National Basic Research Program of China (Grants Nos. 2015CB921400 and 2011CB921802) and the National Natural Science Foundation of China (Grants Nos. 11374057, 11434003, and 11421404).

摘要/Abstract

摘要：

The surface impurity effect on the surface-state conductivity and weak antilocalization (WAL) effect has been investigated in epitaxial Bi (111) films by magnetotransport measurements at low temperatures. The surface-state conductivity is significantly reduced by the surface impurities of Cu, Fe, and Co. The magnetotransport data demonstrate that the observed WAL is robust against deposition of nonmagnetic impurities, but it is quenched by the deposition of magnetic impurities which break the time reversal symmetry. Our results help to shed light on the effect of surface impurities on the electron and spin transport properties of a 2D surface electron systems.

关键词: bismuth, weak antilocalization, surface states

Abstract:

Key words: bismuth, weak antilocalization, surface states

中图分类号: (Surface conductivity and carrier phenomena)

73.25.+i

71.30.+h (Metal-insulator transitions and other electronic transitions) 73.50.-h (Electronic transport phenomena in thin films)

朱凯, 田岱, 伍琳, 许建丽, 金晓峰. Impurity effect on surface states of Bi (111) ultrathin films[J]. 中国物理B, 2016, 25(8): 87303-087303.

Kai Zhu(朱凯), Dai Tian(田岱), Lin Wu(伍琳), Jianli Xu(许建丽), Xiaofeng Jin(金晓峰). Impurity effect on surface states of Bi (111) ultrathin films[J]. Chin. Phys. B, 2016, 25(8): 87303-087303.

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Impurity effect on surface states of Bi (111) ultrathin films

Impurity effect on surface states of Bi (111) ultrathin films

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