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arXiv · 1901.10297

Electronic thermal conductivity in 2D topological insulator in a HgTe quantum well

G. M. Gusev·Z. D. Kvon·A. D. Levin·E. B. Olshanetsky·O. E. Raichev·N. N. Mikhailovand·S. A. Dvoretsky
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Abstract

We have measured the differential resistance in a two-dimensional topological insulator (2DTI) in a HgTe quantum well, as a function of the applied dc current. The transport near the charge neutrality point is characterized by a pair of counter propagating gapless edge modes. In the presence of an electric field, the energy is transported by counter propagating channels in the opposite direction. We test a hot carrier effect model and demonstrate that the energy transfer complies with the Wiedemann Franz law near the charge neutrality point in the edge transport regime.

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G. M. Gusev, Z. D. Kvon, A. D. Levin, E. B. Olshanetsky, O. E. Raichev, N. N. Mikhailovand, S. A. Dvoretsky. 2019-01-29. Electronic thermal conductivity in 2D topological insulator in a HgTe quantum well. https://doi.org/10.1038/s41598-018-36705-5

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