CM & STAT. PHYSICS - Disorder and Strong Electron Correlations

[de_comel]

Condensed Matter and Statistical Physics Section
SEMINAR on Disorder and Strong Electron Correlations


Thursday, 1 August 2013  at 11.30 a.m.

Venue:  Luigi Stasi Lecture Hall, ICTP Leonardo Building, 1st floor


Speaker:
VLADIMIR YUDSON
Institute of Spectroscopy, Troitsk, Russia


Title:
Localization at the Edge of 2D Topological Insulator
by Kondo Impurities with Random Anisotropies


Abstract:
We consider chiral electrons moving along the 1D helical edge of a 2D 
topological insulator and interacting with a disordered chain of Kondo 
impurities. Assuming the electron-spin couplings of random anisotropies, 
we map this system to the problem of the pinning of the charge density 
wave by the disordered potential. This mapping proves that arbitrary 
weak anisotropic disorder in coupling of chiral electrons with spin 
impurities leads to the Anderson localization of the helical edge states 
[1].


[1] B.L. Altshuler, I.L. Aleiner, and V.I. Yudson, preprint arXiv:
     1306.2626