Electron-Hole Scattering Limited Transport of Dirac Fermions in a Topological Insulator.

  title={Electron-Hole Scattering Limited Transport of Dirac Fermions in a Topological Insulator.},
  author={Valentin L M{\"u}ller and Yuan Yan and Oleksiy Kashuba and Bjorn Trauzettel and Mohamed Abdelghany and Johannes Kleinlein and Wouter Beugeling and Hartmut Buhmann and Laurens W. Molenkamp},
  journal={Nano letters},
We have experimentally investigated the effect of electron temperature on transport in the two-dimensional Dirac surface states of the three-dimensional topological insulator HgTe. We have found that around the minimal conductivity point, where both electrons and holes are present, heating the carriers with a DC current results in a nonmonotonic differential resistance of narrow channels. We have shown that the observed initial increase in resistance can be attributed to electron-hole… 

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