Magneto-transport measurements on gated highmobility
heterostructures containing a 60 nm layer of tensile-strained
HgTe, a three-dimensional topological insulator, show well-developed Hall quantization from surface states both in the n- as well as in the ptype regime. While the n-type behavior is due to transport in the topological surface state of the material, we find from 8-orbital k·p calculations that the p-type transport results from massive Volkov−Pankratov states. Their formation prevents the Dirac point and thus the p-conducting topological surface state from being accessible in transport experiments. This interpretation is supported by low-field magneto-transport experiments demonstrating the coexistence of nconducting topological surface states and p-conducting Volkov−Pankratov states at the relevant gate voltages.
%0 Journal Article
%1 Mahler_2021
%A Mahler, David M.
%A Müller, Valentin L.
%A Thienel, Cornelius
%A Wiedenmann, Jonas
%A Beugeling, Wouter
%A Buhmann, Hartmut
%A Molenkamp, Laurens W.
%D 2021
%I American Chemical Society (ACS)
%J Nano Letters
%K qt
%N 23
%P 9869--9874
%R 10.1021/acs.nanolett.1c02456
%T Massive and Topological Surface States in Tensile-Strained HgTe
%U https://doi.org/10.1021%2Facs.nanolett.1c02456
%V 21
%X Magneto-transport measurements on gated highmobility
heterostructures containing a 60 nm layer of tensile-strained
HgTe, a three-dimensional topological insulator, show well-developed Hall quantization from surface states both in the n- as well as in the ptype regime. While the n-type behavior is due to transport in the topological surface state of the material, we find from 8-orbital k·p calculations that the p-type transport results from massive Volkov−Pankratov states. Their formation prevents the Dirac point and thus the p-conducting topological surface state from being accessible in transport experiments. This interpretation is supported by low-field magneto-transport experiments demonstrating the coexistence of nconducting topological surface states and p-conducting Volkov−Pankratov states at the relevant gate voltages.
@article{Mahler_2021,
abstract = {Magneto-transport measurements on gated highmobility
heterostructures containing a 60 nm layer of tensile-strained
HgTe, a three-dimensional topological insulator, show well-developed Hall quantization from surface states both in the n- as well as in the ptype regime. While the n-type behavior is due to transport in the topological surface state of the material, we find from 8-orbital k·p calculations that the p-type transport results from massive Volkov−Pankratov states. Their formation prevents the Dirac point and thus the p-conducting topological surface state from being accessible in transport experiments. This interpretation is supported by low-field magneto-transport experiments demonstrating the coexistence of nconducting topological surface states and p-conducting Volkov−Pankratov states at the relevant gate voltages.},
added-at = {2022-07-05T10:11:54.000+0200},
author = {Mahler, David M. and Müller, Valentin L. and Thienel, Cornelius and Wiedenmann, Jonas and Beugeling, Wouter and Buhmann, Hartmut and Molenkamp, Laurens W.},
biburl = {https://www.bibsonomy.org/bibtex/26788669cf9dcdd6af5a142de5f6a666e/ep3qt},
doi = {10.1021/acs.nanolett.1c02456},
interhash = {69a7d68b470d4417222c4b82e268eaa6},
intrahash = {6788669cf9dcdd6af5a142de5f6a666e},
journal = {Nano Letters},
keywords = {qt},
month = {11},
number = 23,
pages = {9869--9874},
publisher = {American Chemical Society ({ACS})},
timestamp = {2022-07-05T10:11:54.000+0200},
title = {Massive and Topological Surface States in Tensile-Strained {HgTe}},
url = {https://doi.org/10.1021%2Facs.nanolett.1c02456},
volume = 21,
year = 2021
}