Disordered topological metals
نویسندگان
چکیده
Julia S. Meyer1 and Gil Refael2,3 1SPSMS, UMR-E 9001 CEA/UJF-Grenoble 1, INAC, Grenoble, F-38054, France 2Department of Physics, California Institute of Technology, MC 149-33, 1200 E. California Blvd., Pasadena, California 91125, USA 3Dahlem Center for Complex Quantum Systems and Fachbereich Physik, Freie Universität Berlin, 14195 Berlin, Germany (Received 22 November 2012; published 26 March 2013)
منابع مشابه
Bulk metals with helical surface states
In the flurry of experiments looking for topological insulator materials, it has been recently discovered that some bulk metals very close to topological insulator electronic states support the same topological surface states that are the defining characteristic of the topological insulator. First observed in spin-polarized angle resolved photoemission spectroscopy ARPES in Sb D. Hsieh et al., ...
متن کاملCritical Scaling of the Conductance in a Disordered Insulator
The evidence of a significant role played by electron-interaction effects in disordered metals' ' suggests an even greater role in the insulating phase" where metallic screening is absent. Historically, a number of experiments in the localized regime have been explained on the basis of the noninteracting Anderson model, in which the insulator is viewed as a Fermi glass." The most widely applied...
متن کاملSuperconducting ‘‘metals’’ and ‘‘insulators’’
We propose a characterization of zero-temperature phases in disordered superconductors on the basis of the nature of quasiparticle transport. In three-dimensional systems, there are two distinct phases in close analogy to the distinction between normal metals and insulators: the superconducting ‘‘metal’’ with delocalized quasiparticle excitations and the superconducting ‘‘insulator’’ with local...
متن کاملZero bias anomaly in the density of states of low - dimensional metals
We consider the effect of Coulomb interactions on the average density of states (DOS) of disordered low-dimensional metals for temperatures T and frequencies ω smaller than the inverse elastic life-time 1/τ0. Using the fact that long-range Coulomb interactions in two dimensions (2d) generate ln singularities in the DOS ν(ω) but only ln-singularities in the conductivity σ(ω), we can re-sum the m...
متن کاملFinite-temperature conductivity and magnetoconductivity of topological insulators.
The electronic transport experiments on topological insulators exhibit a dilemma. A negative cusp in magnetoconductivity is widely believed as a quantum transport signature of the topological surface states, which are immune from localization and exhibit the weak antilocalization. However, the measured conductivity drops logarithmically when lowering temperature, showing a typical feature of th...
متن کامل