Gauge field theory approach to spin transport in a 2D electron gas
We discuss the Pauli Hamiltonian including the spin-orbit interaction within an U(1) * SU(2) gauge theory interpretation, where the gauge symmetry appears to be broken. This interpretation offers new insight into the problem of spin currents in the condensed matter environment, and can be extended...
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| Datum: | 2009 |
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| Hauptverfasser: | , , , |
| Format: | Artikel |
| Sprache: | English |
| Veröffentlicht: |
Інститут фізики конденсованих систем НАН України
2009
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| Schriftenreihe: | Condensed Matter Physics |
| Online Zugang: | http://dspace.nbuv.gov.ua/handle/123456789/120551 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Zitieren: | Gauge field theory approach to spin transport in a 2D electron gas / B. Berche, N. Bolìvar, A. López, E. Medina // Condensed Matter Physics. — 2009. — Т. 12, № 4. — С. 707-716. — Бібліогр.: 31 назв. — англ. |
Institution
Digital Library of Periodicals of National Academy of Sciences of Ukraine| Zusammenfassung: | We discuss the Pauli Hamiltonian including the spin-orbit interaction within an U(1) * SU(2) gauge theory
interpretation, where the gauge symmetry appears to be broken. This interpretation offers new insight into
the problem of spin currents in the condensed matter environment, and can be extended to Rashba and
Dresselhaus spin-orbit interactions. We present a few outcomes of the present formulation: i) it automatically
leads to zero spin conductivity, in contrast to predictions of Gauge symmetric treatments, ii) a topological
quantization condition leading to voltage quantization follows, and iii) spin interferometers can be conceived in
which, starting from an arbitrary incoming unpolarized spinor, it is always possible to construct a perfect spin
filtering condition. |
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