Using torsion to manipulate spin currents

Abstract

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.

References in corpus (10)

• Continuum model for chiral induced spin selectivity in helical molecules
• The gauge theory of dislocations: static solutions of screw and edge dislocations
• Deformations of the spin currents by topological screw dislocation and cosmic dispiration
• Gauge symmetry breaking and topological quantization for the Pauli Hamiltonian
• Classical Yang-Mills theory in condensed matter physics
• Generation of optical vorticity from topological defects
• Spin superfluidity and spin-orbit gauge symmetry fixing
• Gauge transformations and conserved quantities in classical and quantum mechanics
• Effects on the Non-Relativistic Dynamics of a Charged Particle Interacting with a Chern-Simons Potential
• Bound state and persistent currents in the presence of torsion and Rashba spin-orbit coupling

Cited by in corpus (3)

• Introduction to topological defects: from liquid crystals to particle physics
• Diffusion in the presence of a chiral topological defect
• A supersymmetric spin current