Universal features of spin transport and breaking of unitary symmetries
Jacquod, Ph. and Adagideli, İnanç (2013) Universal features of spin transport and breaking of unitary symmetries. Physical Review B: Condensed Matter and Materials Physics, 88 (4). ISSN 1098-0121
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Official URL: http://dx.doi.org/10.1103/PhysRevB.88.041305
When time-reversal symmetry is broken, quantum coherent systems with and without spin rotational symmetry exhibit the same universal behavior in their electric transport properties. We show that spin transport discriminates between these two cases. In systems with large charge conductance, spin transport is essentially insensitive to the breaking of time-reversal symmetry, while in the opposite limit of a single exit transport channel, spin currents vanish identically in the presence of time-reversal symmetry but can be turned on by breaking it with an orbital magnetic field.
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