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Title: Large surface conductance and superconductivity in topological insulator microstructures

Abstract

Controllable geometric manipulation via micromachining techniques provides a promising tool for enhancing useful topological electrical responses relevant to future applications such as quantum information science [P. J. W. Moll, “Focused ion beam microstructuring of quantum matter,” Annu. Rev. Condens. Matter Phys. 9, 147 (2018); Jang et al., “Observation of half-height magnetization steps in Sr2RuO4,” Science 331, 186 (2011); Moll et al., “Transport evidence for Fermi-arc-mediated chirality transfer in the Dirac semimetal Cd3As2,” Nature 535, 266 (2016); Moll et al., “Evidence for hydrodynamic electron flow in PdCoO2,” Science 351, 1061 (2016)]. Here, we present microdevices fabricated with a focused ion beam from an indium-doped topological insulator Pb1–xSnxTe. Furthermore, with the device thickness on the order of 1 μm and an extremely large bulk resistivity, we achieve an unprecedented enhancement of the surface contribution to about 30% of the total conductance near room temperature.

Authors:
ORCiD logo [1];  [1];  [1];  [1];  [1]; ORCiD logo [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1572356
Alternate Identifier(s):
OSTI ID: 1571675
Report Number(s):
BNL-212271-2019-JAAM
Journal ID: ISSN 0003-6951; TRN: US2001102
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 115; Journal Issue: 17; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Li, Yangmu, Wu, Jie, Camino, Fernando, Gu, G. D., Božović, Ivan, and Tranquada, John M. Large surface conductance and superconductivity in topological insulator microstructures. United States: N. p., 2019. Web. doi:10.1063/1.5122789.
Li, Yangmu, Wu, Jie, Camino, Fernando, Gu, G. D., Božović, Ivan, & Tranquada, John M. Large surface conductance and superconductivity in topological insulator microstructures. United States. doi:10.1063/1.5122789.
Li, Yangmu, Wu, Jie, Camino, Fernando, Gu, G. D., Božović, Ivan, and Tranquada, John M. Mon . "Large surface conductance and superconductivity in topological insulator microstructures". United States. doi:10.1063/1.5122789. https://www.osti.gov/servlets/purl/1572356.
@article{osti_1572356,
title = {Large surface conductance and superconductivity in topological insulator microstructures},
author = {Li, Yangmu and Wu, Jie and Camino, Fernando and Gu, G. D. and Božović, Ivan and Tranquada, John M.},
abstractNote = {Controllable geometric manipulation via micromachining techniques provides a promising tool for enhancing useful topological electrical responses relevant to future applications such as quantum information science [P. J. W. Moll, “Focused ion beam microstructuring of quantum matter,” Annu. Rev. Condens. Matter Phys. 9, 147 (2018); Jang et al., “Observation of half-height magnetization steps in Sr2RuO4,” Science 331, 186 (2011); Moll et al., “Transport evidence for Fermi-arc-mediated chirality transfer in the Dirac semimetal Cd3As2,” Nature 535, 266 (2016); Moll et al., “Evidence for hydrodynamic electron flow in PdCoO2,” Science 351, 1061 (2016)]. Here, we present microdevices fabricated with a focused ion beam from an indium-doped topological insulator Pb1–xSnxTe. Furthermore, with the device thickness on the order of 1 μm and an extremely large bulk resistivity, we achieve an unprecedented enhancement of the surface contribution to about 30% of the total conductance near room temperature.},
doi = {10.1063/1.5122789},
journal = {Applied Physics Letters},
number = 17,
volume = 115,
place = {United States},
year = {2019},
month = {10}
}

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