Pseudospin-filter tunneling of massless Dirac fermions

doi:10.1088/1674-1056/ad78d9

中国物理B ›› 2024, Vol. 33 ›› Issue (11): 117401-117401.doi: 10.1088/1674-1056/ad78d9

Pseudospin-filter tunneling of massless Dirac fermions

Zhengdong Li(李政栋) and Wen Zeng(曾文)†

Department of Physics, Jiangsu University, Zhenjiang 212013, China

收稿日期:2024-07-09 修回日期:2024-08-17 接受日期:2024-09-10 出版日期:2024-11-15 发布日期:2024-11-15
基金资助:
Project supported by the College Student Innovation Project (Grant No. 202310299517X) and the Scientific Research Project of Jiangsu University (Grant No. 22A716).

Pseudospin-filter tunneling of massless Dirac fermions

Zhengdong Li(李政栋) and Wen Zeng(曾文)†

Department of Physics, Jiangsu University, Zhenjiang 212013, China

Received:2024-07-09 Revised:2024-08-17 Accepted:2024-09-10 Online:2024-11-15 Published:2024-11-15
Contact: Wen Zeng E-mail:zeng@ujs.edu.cn
Supported by:
Project supported by the College Student Innovation Project (Grant No. 202310299517X) and the Scientific Research Project of Jiangsu University (Grant No. 22A716).

摘要/Abstract

摘要： The tunneling of the massless Dirac fermions through a vector potential barrier are theoretically investigated, where the vector potential can be introduced by very high and very thin ($\delta$-function) magnetic potential barriers. We show that, distinct from the previously studied electric barrier tunneling, the vector potential barriers are more transparent for pseudospin-1/2 Dirac fermions but more obstructive for pseudospin-1 Dirac fermions. By tuning the height of the vector potential barrier, the pseudospin-1/2 Dirac fermions remain transmitted, whereas the transmission of the pseudospin-$1$ Dirac fermions is forbidden, leading to a pseudospin filtering effect for massless Dirac fermions.

关键词: tunneling junction, pseudospin filter, magnetic barrier

Abstract: The tunneling of the massless Dirac fermions through a vector potential barrier are theoretically investigated, where the vector potential can be introduced by very high and very thin ($\delta$-function) magnetic potential barriers. We show that, distinct from the previously studied electric barrier tunneling, the vector potential barriers are more transparent for pseudospin-1/2 Dirac fermions but more obstructive for pseudospin-1 Dirac fermions. By tuning the height of the vector potential barrier, the pseudospin-1/2 Dirac fermions remain transmitted, whereas the transmission of the pseudospin-$1$ Dirac fermions is forbidden, leading to a pseudospin filtering effect for massless Dirac fermions.

Key words: tunneling junction, pseudospin filter, magnetic barrier

中图分类号: (Tunneling phenomena; Josephson effects)

74.50.+r

73.43.Jn (Tunneling)

Zhengdong Li(李政栋) and Wen Zeng(曾文). Pseudospin-filter tunneling of massless Dirac fermions[J]. 中国物理B, 2024, 33(11): 117401-117401.

Zhengdong Li(李政栋) and Wen Zeng(曾文). Pseudospin-filter tunneling of massless Dirac fermions[J]. Chin. Phys. B, 2024, 33(11): 117401-117401.

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Pseudospin-filter tunneling of massless Dirac fermions

Pseudospin-filter tunneling of massless Dirac fermions

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