The Aharonov-Bohm-Casher ring-dot as a flux-tunable resonant tunneling diode

Abstract

A mesoscopic ring subject to the Rashba spin-orbit interaction and sequentially coupled to an interacting quantum dot, in the presence of Aharonov-Bohm flux, is proposed as a flux tunable tunneling diode. The analysis of the conductance by means of the nonequilibrium Green's function technique, shows an intrinsic bistability at varying the Aharonov-Bohm flux when 2U > πΓ, U being the charging energy on the dot and Γthe effective resonance width. The bistability properties are discussed in connection with spin-switch effects and logical storage device applications.

arXiv commentto appear on PRB

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Cited by in corpus (5)

• Quantum pumping and rectification effects in Aharonov-Bohm-Casher ring-dot systems
• Interference of heavy holes in an Aharonov-Bohm ring
• Detection of spin bias in four-terminal quantum-dot ring
• Rashba-induced transverse pure spin currents in a four-terminal quantum dot ring
• Spin interference and Fano effect in electron transport through a mesoscopic ring side-coupled with a quantum dot