119 citations · 400 across the 8 of their papers we have counts for
6 papers · 1 filter
Charge puddles in the bulk and on the surface of the topological insulator BiSbTeSe studied by scanning tunneling microscopy and optical spectroscopy
T. Knispel, W. Jolie, N. Borgwardt +6
The topological insulator BiSbTeSe corresponds to a compensated semiconductor in which strong Coulomb disorder gives rise to the formation of charge puddles, i.e., local accumu…
Gigantic negative magnetoresistance in a disordered topological insulator
Oliver Breunig, Zhiwei Wang, A. A. Taskin +3
With the recent discovery of Weyl semimetals, the phenomenon of negative magnetoresistance (MR) is attracting renewed interest. While small negative MR can occur due to the suppres…
Length scale of puddle formation in compensation-doped semiconductors and topological insulators
Thomas Bömerich, Jonathan Lux, Qingyufei Terenz Feng +1
In most semiconductors and insulators the presence of a small density of charged impurities cannot be avoided, but their effect can be reduced by compensation doping, i.e. by intro…
Revealing puddles of electrons and holes in compensated topological insulators
N. Borgwardt, J. Lux, I. Vergara +7
Three-dimensional topological insulators harbour metallic surface states with exotic properties. In transport or optics, these properties are typically masked by defect-induced bul…
Interaction dominated transport and Coulomb drag in bilayer graphene
Jonathan Lux, Lars Fritz
We investigate interaction effects in transport phenomena in bilayer graphene (BLG). For the minimal conductivity in pristine BLG, we find that the conductivity assumes a constant…
Kinetic theory of Coulomb drag in two monolayers of graphene: from the Dirac point to the Fermi liquid regime
Jonathan Lux, Lars Fritz
We theoretically investigate Coulomb drag in a system of two parallel monolayers of graphene. Using a Boltzmann equation approach we study a variety of limits ranging from the non-…