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Kosterlitz-Thouless transition in disordered two-dimensional topological insulators
- Publication Year :
- 2012
- Publisher :
- arXiv, 2012.
-
Abstract
- The disorder-driven metal-insulator transition in the quantum spin Hall systems is studied by scaling analysis of the Thouless conductance $g$. Below a critical disorder strength, the conductance is independent of the sample size $M$, an indication of critically delocalized electron states. The calculated beta function $\beta=d\ln g/d\ln M$ indicates that the metal-insulator transition is Kosterlitz-Thouless (KT) type, which is characterized by bounding and unbounding of vortex-antivortex pairs of the local currents. The KT like metal-insulator transition is a basic characteristic of the quantum spin Hall state, being independent of the time-reversal symmetry.<br />Comment: 5 pages, 4 figures
- Subjects :
- FOS: Physical sciences
Insulator (electricity)
Condensed Matter::Disordered Systems and Neural Networks
Phase Transition
Delocalized electron
Condensed Matter - Strongly Correlated Electrons
Condensed Matter::Superconductivity
Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
Transition Temperature
General Materials Science
Scaling
Physics
Condensed Matter::Quantum Gases
Condensed matter physics
Condensed Matter - Mesoscale and Nanoscale Physics
Strongly Correlated Electrons (cond-mat.str-el)
Electric Conductivity
Conductance
Models, Theoretical
Condensed Matter Physics
Vortex
Kosterlitz–Thouless transition
Metals
Topological insulator
Quantum Theory
Condensed Matter::Strongly Correlated Electrons
Subjects
Details
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....8a8072fb61b5a382d3a4bbba8a8c59f1
- Full Text :
- https://doi.org/10.48550/arxiv.1204.0236