Using torsion to manipulate spin currents

Sébastien Fumeron, Bertrand Berche, Ernesto Medina, Fernando A.N. Santos, Fernando Moraes

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


We address the problem of quantum particles moving on a manifold characterised by the presence of torsion along a preferential axis. In fact, such a torsion may be taylored by the presence of a single screw dislocation, whose Burgers vector measures the torsion amplitude. The problem, first treated in the relativistic limit describing fermions that couple minimally to torsion, is then analysed in the Pauli limit. We show that torsion induces a geometric potential and also that it couples generically to the phase of the wave function, giving rise to the possibility of using torsion to manipulate spin currents in the case of spinor wave functions. These results emerge as an alternative strategy for using screw dislocations in the design of spintronic-based devices.

Original languageEnglish
Article number47007
JournalEurophysics Letters
Issue number4
StatePublished - Feb 2017
Externally publishedYes


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