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http://eprints.org/relation/isVersionOf http://eprints.iliauni.edu.ge/id/document/2742 http://eprints.org/relation/isVolatileVersionOf http://eprints.iliauni.edu.ge/id/document/2742 http://eprints.org/relation/ismediumThumbnailVersionOf http://eprints.iliauni.edu.ge/id/document/2742 2768 2 7939 document 2768 small.jpg image/png c3110e4f697d493d03862b19a323519c MD5 1886 2014-01-27 17:34:05 http://eprints.iliauni.edu.ge/718/5/small.jpg 718 5 5 image/png other Thumbnails conversion from text to thumbnail_small ge public

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http://eprints.org/relation/isVersionOf http://eprints.iliauni.edu.ge/id/document/2742 http://eprints.org/relation/isVolatileVersionOf http://eprints.iliauni.edu.ge/id/document/2742 http://eprints.org/relation/issmallThumbnailVersionOf http://eprints.iliauni.edu.ge/id/document/2742 archive 34 disk0/00/00/07/18 2014-01-30 20:02:57 2015-04-03 06:20:57 2014-01-30 20:02:57 article show Braunecker Bernd Stroem Anders Japaridze G.I. gia_japaridze@iliauni.edu.ge pub QC fac_eng public 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 ``quasi-helical'' because the spins of the counterpropagating modes are not perfectly antiparallel and have a small spin-wavefunction 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 quasi-helical conductor, and one at a higher field again to a localized state, due now, however, to backscattering below the magnetic field induced pseudo-gap. We investigate these transitions using a unified 2-step renormalization group approach. 2013-02-28 published Physical Review B 87 7 American Physical Society 075151-075155 TRUE Georgian NSF Grant No. ST09/4-447 SCOPES Grant IZ73Z0-128058