Magnetic-field switchable metal-insulator transitions in a quasihelical conductor
Entity
UAM. Departamento de Física Teórica de la Materia CondensadaPublisher
American Physical SocietyDate
2013-02-28Citation
10.1103/PhysRevB.87.075151
Physycal Review B 87.7 (2013): 075151
ISSN
1098-0121; 1550-235X (online)DOI
10.1103/PhysRevB.87.075151Funded by
B.B. acknowledges the support by the EU-FP7 Project SE2ND [271554]. A.S. acknowledges the support by the Swedish research council,Grant No. 621-2011-3942. G.I.J. acknowledges the support by the Georgian NSF Grant No. ST09/4-447 and by the SCOPES Grant No. IZ73Z0-128058Project
info:eu-repo/grantAgreement/EC/FP7/271554Editor's Version
http://dx.doi.org/10.1103/PhysRevB.87.075151Subjects
FísicaRights
© 2013 American Physical SocietyAbstract
We study Anderson localization in disordered helical conductors that are obtained from one-dimensional conductors with spin-orbit interaction and a magnetic field, or from equivalent systems. We call such conductors "quasihelical" because the spins of the counterpropagating modes are not perfectly antiparallel and have a small spin-wave-function overlap that is tunable by the magnetic field. Due to the overlap, disorder backscattering is possible and allows a localization transition. A conductor can pass through two localization transitions with increasing field, one from the conventionally localized system to the quasihelical conductor (with localization length exceeding the system length), and one at a higher field again to a localized state, due now, however, to backscattering below the magnetic-field induced pseudogap. We investigate these transitions using a unified two-step renormalization group approach
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Google Scholar:Braunecker, Bernd
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Ström, Anders
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Japaridze, G. I.
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