Universal features of spin transport and breaking of unitary symmetries

Ph Jacquod, I. Adagideli

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Scopus)

Abstract

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. However, in the opposite limit of a single exit channel, spin currents vanish identically in the presence of time-reversal symmetry, but are turned on by breaking it with an orbital magnetic field.
Original languageEnglish
Article number041305(R)
JournalPhysical Review B
Volume88
Issue number4
DOIs
Publication statusPublished - 15 Jul 2013
Externally publishedYes

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