scholarly journals Aharonov-Bohm oscillations in a mesoscopic ring with asymmetric arm-dependent injection

2007 ◽  
Vol 75 (3) ◽  
Author(s):  
P. Vasilopoulos ◽  
O. Kálmán ◽  
F. M. Peeters ◽  
M. G. Benedict
Keyword(s):  
Mesoscopic Ring ◽  
Aharonov Bohm

TRANSPORT THROUGH INTERACTING AHARONOV–BOHM–CASHER INTERFEROMETERS

2011 ◽  
Vol 25 (22) ◽  
pp. 3019-3025
Author(s):  
QING-QIANG XU ◽  
BEN-LING GAO ◽  
SHI-JIE XIONG
Keyword(s):  
Magnetic Flux ◽  
Electronic Transport ◽  
Transport Processes ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Spin Filter ◽  
Rashba Spin ◽  
Mesoscopic Ring ◽  
Universal Regime ◽  
Aharonov Bohm

We investigate the transport properties of an interacting ring threaded by a magnetic flux and with Rashba spin-orbit coupling, based on a recently developed functional renormalized group technique. In the calculations of the electronic transport processes, the Coloumb On-site interactions are taken into account. For an interacting ring connected to two leads, we find that (i) for ΦAC = 0, the behavior of transmission zero at ΦAB = π is generic for the universal regime; (ii) for certain ΦAC and ΦAB, one can use the mesoscopic ring as spin filter even in the presence of the local interaction in the 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.

New h/e oscillations and electrostatic Aharonov-Bohm effect in a GaAsAl/GaAs-based mesoscopic ring

1996 ◽  
Vol 361-362 ◽  
pp. 751-755 ◽  
Author(s):  
Kyoungwan Park ◽  
Seongjae Lee ◽  
Mincheol Shin ◽  
El-Hang Lee ◽  
HyukChan Kwon
Keyword(s):  
Bohm Effect ◽  
Mesoscopic Ring ◽  
Aharonov Bohm

scholarly journals ROLE OF QUANTUM ENTANGLEMENT DUE TO A MAGNETIC IMPURITY ON CURRENT MAGNIFICATION EFFECT IN MESOSCOPIC OPEN RINGS

2001 ◽  
Vol 15 (01) ◽  
pp. 19-26 ◽  
Author(s):  
COLIN BENJAMIN ◽  
SANDEEP K. JOSHI ◽  
DEBENDRANATH SAHOO ◽  
A. M. JAYANNAVAR
Keyword(s):  
Exchange Interaction ◽  
Quantum Entanglement ◽  
Electron Spin ◽  
Magnetic Impurity ◽  
Impurity Spin ◽  
Mesoscopic Ring ◽  
Exchange Scattering ◽  
Aharonov Bohm ◽  
Magnification Effect

We study the current magnification effect in presence of exchange scattering of electron from a magnetic impurity placed in one arm of an open mesoscopic ring. The exchange interaction causes entanglement of electron spin and impurity spin. Earlier studies have shown that such an entanglement causes reduction or loss of interference in the Aharonov–Bohm oscillations leading to decoherence. We find however, that this entanglement, in contradiction to the naive expectation of a reduction in current magnification leads to enhancement as well as suppression of the effect. We also observe additional novel features like new resonances and current reversals.

QUANTUM WAVEGUIDE THEORY FOR A MESOSCOPIC RING SUBJECT TO THE AHARONOV–CASHER EFFECT

1996 ◽  
Vol 10 (09) ◽  
pp. 401-407 ◽  
Author(s):  
CHANG-MO RYU ◽  
TAESEUNG CHOI ◽  
CHUL KOO KIM ◽  
KYUN NAHM
Keyword(s):  
Gauge Theory ◽  
Quantum Interference ◽  
Transmission Probability ◽  
Quantum Waveguide ◽  
One Dimensional ◽  
Device Application ◽  
Waveguide Theory ◽  
Mesoscopic Ring ◽  
Aharonov Bohm

A one-dimensional quantum waveguide theory is developed for a mesoscopic ring subject to the Aharonov–Casher(AC) effect based on the SU (2) spin gauge theory. The quantum interference by the AC effect is found to be equivalent to that by the Aharonov–Bohm(AB) effect. This indicates that AC effect can be utilized for device application in a very similar manner to the AB effect. The transmission probability induced by the AC effect is shown to be identical for the spin up and down components.

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