Pumping in a mesoscopic ring with Ahronov-Casher effect

Abstract

We investigate parametric pumping of spin and charge currents in a mesoscopic ring interrupted by a tunnel barrier in presence of Aharonov-Casher (AC) effect and Aharonov-Bohm (AB) flux along the axis of the same ring. Generation of a dc current is achieved by tuning the tunnel barrier strength and modulating in time either a radial(transverse) electric field or the magnetic flux. A pure spin current is generated by the interplay of breaking spin reversal symmetry, due to AC effect, and time-reversal symmetry breaking, intrinsic in parametric pumping procedure. We analyze the conditions for operating the AB-AC ring as a pure spin pump useful in spintronics and discuss generalization of our results to Rashba-gate-controlled rings.

PRB, to appear

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Cited by in corpus (28)

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• Bound states and persistent currents in topological insulator rings
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• Quantum rings with time dependent spin-orbit coupling: Rabi oscillations, spintronic Schrodinger-cat states, and conductance properties
• Topological pumping in Aharonov-Bohm rings
• A Topological Spin Chern Pump
• Quantum pumping and rectification effects in Aharonov-Bohm-Casher ring-dot systems
• Topological and noninertial effects in an Aharonov-Bohm ring
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• Topological insulator ring with magnetic impurities
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• Quantum pump driven fermionic Mach-Zehnder interferometer
• Tunneling Aharonov-Bohm interferometer on helical edge states
• Pumped shot noise in adiabatically modulated graphene-based double-barrier structures
• Fano resonance in the nonadiabatic pumped shot noise of a time-dependent potential well
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