%0 Journal Article %1 M_ller_2021 %A Müller, Valentin L. %A Yan, Yuan %A Kashuba, Oleksiy %A Trauzettel, Björn %A Abdelghany, Mohamed %A Kleinlein, Johannes %A Beugeling, Wouter %A Buhmann, Hartmut %A Molenkamp, Laurens W. %D 2021 %I American Chemical Society (ACS) %J Nano Letters %K qt %R 10.1021/acs.nanolett.1c01271 %T Electron–Hole Scattering Limited Transport of Dirac Fermions in a Topological Insulator %U https://doi.org/10.1021%2Facs.nanolett.1c01271 %X 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 scattering, while the decrease follows naturally from the change in Fermi energy of the charge carriers. Both effects are governed dominantly by a van Hove singularity in the bulk valence band. The results demonstrate the importance of interband electron−hole scattering in the transport properties of topological insulators.

@article{M_ller_2021, abstract = {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 scattering, while the decrease follows naturally from the change in Fermi energy of the charge carriers. Both effects are governed dominantly by a van Hove singularity in the bulk valence band. The results demonstrate the importance of interband electron−hole scattering in the transport properties of topological insulators.}, added-at = {2021-06-17T11:37:59.000+0200}, author = {Müller, Valentin L. and Yan, Yuan and Kashuba, Oleksiy and Trauzettel, Björn and Abdelghany, Mohamed and Kleinlein, Johannes and Beugeling, Wouter and Buhmann, Hartmut and Molenkamp, Laurens W.}, biburl = {https://www.bibsonomy.org/bibtex/2f58ffd725f8194321409fa3be11d0b38/ep3qt}, doi = {10.1021/acs.nanolett.1c01271}, interhash = {3a63e851f4de9bcc45d39be3832bc35a}, intrahash = {f58ffd725f8194321409fa3be11d0b38}, journal = {Nano Letters}, keywords = {qt}, month = {6}, publisher = {American Chemical Society ({ACS})}, timestamp = {2021-06-17T11:38:32.000+0200}, title = {Electron{\textendash}Hole Scattering Limited Transport of Dirac Fermions in a Topological Insulator}, url = {https://doi.org/10.1021%2Facs.nanolett.1c01271}, year = 2021 }