STICLET, Doru; DÓRA, Balázs; CAYSSOL, Jérôme

doi:10.1103/PhysRevB.88.205401

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STICLET, Doru
Laboratoire Ondes et Matière d'Aquitaine [LOMA]
Max-Planck-Institut für Physik komplexer Systeme [MPI-PKS]

DÓRA, Balázs
Department of Physics [Budapest]
BME-MTA Exotic Quantum Phases Research Group

CAYSSOL, Jérôme
Laboratoire Ondes et Matière d'Aquitaine [LOMA]
Max-Planck-Institut für Physik komplexer Systeme [MPI-PKS]

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Article de revue

Ce document a été publié dans

Physical Review B: Condensed Matter and Materials Physics (1998-2015). 2013, vol. 88, n° 20, p. 205401

American Physical Society

Résumé en anglais

The persistent current in strictly one-dimensional Dirac systems is investigated within two different models, defined in the continuum and on a lattice, respectively. The object of the study is the effect of a single magnetic or nonmagnetic impurity in the two systems. In the continuum Dirac model, an analytical expression for the persistent current flowing along a ring with a single delta-like magnetic impurity is obtained after regularization of the unbounded negative energy states. The predicted decay of the persistent agrees with the lattice simulations. The results are generalized to finite temperatures. To realize a single Dirac massless fermion, the lattice model breaks the time-reversal symmetry, and, in contrast with the continuum model, a pointlike nonmagnetic impurity can lead to a decay in the persistent current.< Réduire

Mots clés en anglais

Persistent currents

Electron states and collective excitations in multilayers

Electronic transport in nanoscale materials and structures

quantum wells

mesoscopic and nanoscale systems

DOI

http://dx.doi.org/10.1103/PhysRevB.88.205401

Projet Européen

TOPOLOGICAL EFFECTS IN MATTER WITH STRONG SPIN-ORBIT COUPLING
Spin dynamics and transport at the quantum edge in low dimensional nanomaterials

Project ANR

Transport électronique dans les isolants topologiques - ANR-10-BLAN-0419

Origine

Importé de hal

Unités de recherche

Laboratoire Ondes et Matière d'Aquitaine (LOMA) - UMR 5798