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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 |
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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.
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Received: 09 July 2024
Revised: 17 August 2024
Accepted manuscript online: 10 September 2024
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PACS:
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74.50.+r
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(Tunneling phenomena; Josephson effects)
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73.43.Jn
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(Tunneling)
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| 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
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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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