Spin-dependent transmission through a chain of rings: influence of a periodically modulated spin-orbit interaction strength or ring radius

Abstract

We study ballistic electron transport through a finite chain of quantum circular rings in the presence of spin-orbit interaction of strength α. For a single ring the transmission and reflection coefficients are obtained analytically and from them the conductance for a chain of rings as a function of αand of the wave vector k of the incident electron. We show that due to destructive spin interferences the chain can be totaly opaque for certain ranges of k the width of which depends on the value of α. A periodic modulation of the strength αor of the ring radius widens up the gaps considerably and produces a nearly binary conductance output.

arXiv comment4 pages, 4 figures. Appl. Phys. Lett., in press

References in corpus (4)

• Spin-dependent (magneto)transport through a ring due to spin-orbit interaction
• Aharonov-Bohm Oscillations with Spin: Evidence for Berry's Phase
• Quantum Transport in Nonuniform Magnetic Fields: Aharonov-Bohm Ring as a Spin Switch
• Nonadiabatic noncyclic geometric phase and ensemble average spectrum of conductance in disordered mesoscopic rings with spin-orbit coupling

Cited by in corpus (6)

• Mesoscopic rings with Spin-Orbit interactions
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• Spin-Orbit Berry Phase in a Quantum Loop
• Electron transport in waveguides with spatially modulated strengths of the Rashba and Dresselhaus terms of the spin-orbit interaction
• Periodic Structures with Rashba Interaction in Magnetic Field