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Rashba spin-orbit interaction in graphene and zigzag nanoribbons
Abstract
We investigate the effects of Rashba spin-orbit (RSO) interactions on the electronic band structure and corresponding wave functions of graphene. By exactly solving a tight-binding model Hamiltonian we obtain the expected splitting of the bands---due to the SU(2) spin symmetry breaking---that is accompanied by the appearance of additional Dirac points. These points are originated by valence-conduction-band crossings. By introducing a convenient gauge transformation we study a model for zigzag nanoribbons with RSO interactions. We show that RSO interactions lift the quasidegeneracy of the edge band while introducing a state-dependent spin separation in real space. Calculation of the average magnetization perpendicular to the ribbon plane suggest that RSO could be used to produce spin-polarized currents. Comparisons with the intrinsic spin-orbit interaction proposed to exist in graphene are also presented.
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Cites
Two-dimensional gas of massless Dirac fermions in graphene
Novoselov, K. S., Geim, A. K., Morozov, S. V., Jiang, D., Katsnelson, M. I., Grigorieva, I. V., Dubonos, S. V., & Firsov, A. A. (2005) · Nature · doi:10.1038/nature04233 · Cited by 21,611
Z 2 Topological Order and the Quantum Spin Hall Effect
Kane, C. L., & Mele, E. J. (2005) · Physical Review Letters · doi:10.1103/physrevlett.95.146802 · Cited by 6,460
Hirsch, J. E. (1999) · Physical Review Letters · doi:10.1103/physrevlett.83.1834 · Cited by 3,163
Murakami, S. (2005) · Advances in Solid State Physics · doi:10.1007/11423256_16 · Cited by 46
Cited by
Quantum anomalous Hall effect in single-layer and bilayer graphene
Tse, W.-K., Qiao, Z., Yao, Y., MacDonald, A. H., & Niu, Q. (2011) · Physical Review B · doi:10.1103/physrevb.83.155447 · Cited by 258
Metadata
- Authors
- Zarea, M., & Sandler, N.
- Venue
- Physical Review B
- Publisher
- American Physical Society (APS)
- Published
- 2009-04-30
- Volume
- 79
- Issue
- 16
- ISSN
- 1098-0121 (ISSN-L)
- 1550-235X
- OpenAlex
- W2012048872
- Cited by
- 159
- References
- 4
- FWCI
- 6.38
- Type
- journal article
- Language
- en
- Open access
- closed
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