6533b828fe1ef96bd1288db0
RESEARCH PRODUCT
Aharonov–Bohm/Casher effect in a Kondo ring
Henrik JohannessonCharles A. StaffordCharles A. StaffordH.-p EckleH.-p Ecklesubject
PhysicsMesoscopic physicsCondensed matter physicsExchange interactionPersistent currentParity (physics)Condensed Matter::Mesoscopic Systems and Quantum Hall EffectCondensed Matter PhysicsElectronic Optical and Magnetic MaterialsBethe ansatzQuantum mechanicsCondensed Matter::Strongly Correlated ElectronsKondo effectElectrical and Electronic EngineeringKondo modelMagnetic impuritydescription
The in#uence of a magnetic impurity or ultrasmall quantum dot on the spin and charge persistent currents of a mesoscopic ring is investigated. The system consists of electrons in a one-dimensional ring threaded by spin-dependent Aharonov}Bohm/Casher #uxes, and coupled via an antiferromagnetic exchange interaction to a localized electron. The problem is mapped onto a Kondo model for the even-parity channel plus free electrons in the odd-parity channel. The twisted boundary conditions representing the #uxes couple states of opposite parity unless the twist angles / a satisfy / a "f a p, where f a are integers, with spin index a"C, B. For these special values of / a , the model is solvable by the Bethe ansatz. ( 2000 Elsevier Science B.V. All rights reserved.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2000-07-01 | Physica B: Condensed Matter |