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Chin. Phys. B, 2024, Vol. 33(11): 117401    DOI: 10.1088/1674-1056/ad78d9
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

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
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.
Keywords:  tunneling junction      pseudospin filter      magnetic barrier  
Received:  09 July 2024      Revised:  17 August 2024      Accepted manuscript online:  10 September 2024
PACS:  74.50.+r (Tunneling phenomena; Josephson effects)  
  73.43.Jn (Tunneling)  
Fund: Project supported by the College Student Innovation Project (Grant No. 202310299517X) and the Scientific Research Project of Jiangsu University (Grant No. 22A716).
Corresponding Authors:  Wen Zeng     E-mail:  zeng@ujs.edu.cn

Cite this article: 

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

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