Liu, Ming-Hao and Bundesmann, Jan and Richter, Klaus (2012) Spin-dependent Klein tunneling in graphene: Role of Rashba spin-orbit coupling. PHYSICAL REVIEW B, 85 (8): 085406. ISSN 1098-0121, 1550-235X
Full text not available from this repository.Abstract
Within an effective Dirac theory the low-energy dispersions of monolayer graphene in the presence of Rashba spin-orbit coupling and spin-degenerate bilayer graphene are described by formally identical expressions. We explore implications of this correspondence for transport by choosing chiral tunneling through pn and pnp junctions as a concrete example. A real-space Green's function formalism based on a tight-binding model is adopted to perform the ballistic transport calculations, which cover and confirm previous theoretical results based on the Dirac theory. Chiral tunneling in monolayer graphene in the presence of Rashba coupling is shown to indeed behave like in bilayer graphene. Combined effects of a forbidden normal transmission and spin separation are observed within the single-band n <-> p transmission regime. The former comes from real-spin conservation, in analogy with pseudospin conservation in bilayer graphene, while the latter arises from the intrinsic spin-Hall mechanism of the Rashba coupling.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ELECTRONIC TRANSPORT; DIRAC; REFLECTION; JUNCTION; PARADOX; MODEL; GAS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Richter > Group Klaus Richter |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 19 May 2020 09:06 |
| Last Modified: | 19 May 2020 09:06 |
| URI: | https://pred.uni-regensburg.de/id/eprint/19244 |
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