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

被引：12
作者：
Citro, R. [1 ,2 ,3 ]
Romeo, F. [1 ]
机构：
[1] Univ Salerno, Dipartimento Fis ER Caianiello, CNISM, I-84081 Baronissi, Italy
[2] Univ Salerno, NANOMATES, Res Ctr NANOMAt & nanoTEchnol, I-84081 Baronissi, Italy
[3] CNRS, LPM2C, F-38042 Grenoble, France
来源：
PHYSICAL REVIEW B | 2008年 / 77卷 / 19期
关键词：
D O I：
10.1103/PhysRevB.77.193309
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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 > pi Gamma, where U is the charging energy on the dot and Gamma is the effective resonance width. The bistability properties are discussed in connection with spin-switch effects and logical storage device applications.
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页数：4
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