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

2008/05/18 by R. Citro, F. Romeo, Francesco Romeo · 3 citations
Physics and Astronomy · #Magnetic properties of thin films #Quantum and electron transport phenomena #Semiconductor Quantum Structures and Devices #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevb.77.193309

published as Phys. Rev. B 77, 193309 (2008) · to appear on PRB

arxiv created 2008/05/18 · openalex publication_date 2008/05/20 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

A mesoscopic ring subject to the Rashba spin-orbit interaction and sequentially coupled to an interacting quantum dot, in the presence of an 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 Aharonov-Bohm flux when 2U>\ensuremathπ\ensuremathΓ, where U is the charging energy on the dot and \ensuremathΓ is the effective resonance width. The bistability properties are discussed in connection with spin-switch effects and logical storage device applications.

Citations

• Time-dependent transport in interacting and non-interacting mesoscopic systems
• Significance of Electromagnetic Potentials in the Quantum Theory
• Landauer formula for the current through an interacting electron region

Cited by

• Quantum pumping and rectification effects in Aharonov-Bohm-Casher ring-dot systems
• Detection of spin bias in a four-terminal quantum-dot ring
• Interference of heavy holes in an Aharonov-Bohm ring