scholarly journals Kondo Resonance in a Mesoscopic Ring Coupled to a Quantum Dot: Exact Results for the Aharonov-Bohm-Casher Effects

2001 ◽  
Vol 87 (1) ◽  
Author(s):  
H.-P. Eckle ◽  
H. Johannesson ◽  
C. A. Stafford
Keyword(s):  
Quantum Dot ◽  
Exact Results ◽  
Kondo Resonance ◽  
Mesoscopic Ring ◽  
Aharonov Bohm

scholarly journals Kondo Resonance Effect on Persistent Currents through a Quantum Dot in a Mesoscopic Ring

1999 ◽  
Vol 82 (25) ◽  
pp. 5088-5091 ◽  
Author(s):  
V. Ferrari ◽  
G. Chiappe ◽  
E. V. Anda ◽  
Maria A. Davidovich
Keyword(s):  
Quantum Dot ◽  
Resonance Effect ◽  
Persistent Currents ◽  
Kondo Resonance ◽  
Mesoscopic Ring

SPIN-COHERENT TRANSPORT IN MESOSCOPIC INTERFERENCE DEVICE

NANO ◽  
2007 ◽  
Vol 02 (06) ◽  
pp. 389-392 ◽  
Author(s):  
WALID A. ZEIN ◽  
ADEL H. PHILLIPS ◽  
OMAR A. OMAR
Keyword(s):  
Quantum Dot ◽  
Size Effect ◽  
Tunnel Barrier ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Intrinsic Parameters ◽  
Coherent Transport ◽  
Quantum Size ◽  
Mesoscopic Ring ◽  
Aharonov Bohm

We investigate the quantum size effect in the phase coherent mesoscopic ring. A quantum dot is embedded in one arm and it is connected to one lead via tunnel barrier. Both Aharonov–Casher and Aharonov–Bohm effects are studied. A spin-dependent conductance has been deduced and it depends on the intrinsic parameters. Our results show that the strength of spin-orbit coupling depends on the size of the present device. This investigation is valuable for fabricating such spintronics devices.

scholarly journals Aharonov-Bohm oscillations in a mesoscopic ring with a quantum dot

1995 ◽  
Vol 52 (20) ◽  
pp. R14360-R14363 ◽  
Author(s):  
A. Levy Yeyati ◽  
M. Büttiker
Keyword(s):  
Quantum Dot ◽  
Mesoscopic Ring ◽  
Aharonov Bohm

AHARONOV–BOHM OSCILLATIONS AND FANO RESONANCE IN A MESOSCOPIC RING WITH A SIDE-COUPLED QUANTUM DOT

2007 ◽  
Vol 21 (26) ◽  
pp. 1785-1793
Author(s):  
YONG-JIAN XIONG ◽  
ZHOU-BO HE
Keyword(s):  
Quantum Dot ◽  
Transmission Coefficient ◽  
Fermi Energy ◽  
Fano Resonance ◽  
Electron Tunneling ◽  
Phase Jump ◽  
Multi Level ◽  
Mesoscopic Ring ◽  
Aharonov Bohm ◽  
Level Effect

We calculate the transmission coefficient through an Aharonov–Bohm ring with a multi-level quantum dot side-coupled to one arm. Whenever a quantum dot level is tuned across the Fermi energy, the coupled arm is blocked for electron tunneling, namely anti-resonance. This leads to the suppression of the Aharonov–Bohm oscillations, accompanied by a phase jump of π in the oscillations. The Aharonov–Bohm phase also changes sharply by π in between neighboring anti-resonances due to the multi-level effect. The transmission has an expression of the generalized Fano form with a complex Fano parameter q in the presence of the Aharonov–Bohm flux.

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