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Title: Evidence for a strain-tuned topological phase transition in ZrTe5

Abstract

A phase transition between topologically distinct insulating phases involves closing and reopening the bandgap. Near the topological phase transition, the bulk energy spectrum is characterized by a massive Dirac dispersion, where the bandgap plays the role of mass. We report measurements of strain dependence of electrical transport properties of ZrTe5, which is known to host massive Dirac fermions in the bulk due to its proximity to a topological phase transition. We observe that the resistivity exhibits a pronounced minimum at a critical strain. We further find that the positive longitudinal magnetoconductance becomes maximal at the critical strain. This nonmonotonic strain dependence is consistent with the switching of sign of the Dirac mass and, hence, a strain-tuned topological phase transition in ZrTe5.

Authors:
ORCiD logo [1];  [2];  [1];  [1];  [1];  [1]; ORCiD logo [2]; ORCiD logo [1]
  1. Univ. of Washington, Seattle, WA (United States)
  2. Univ. of Alabama, Birmingham, AL (United States)
Publication Date:
Research Org.:
Univ. of Washington, Seattle, WA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); Gordon and Betty Moore Foundation
OSTI Identifier:
1609907
Grant/Contract Number:  
FG02-07ER46452; GBMF6759
Resource Type:
Accepted Manuscript
Journal Name:
Science Advances
Additional Journal Information:
Journal Volume: 5; Journal Issue: 8; Journal ID: ISSN 2375-2548
Publisher:
AAAS
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Science & Technology - Other Topics

Citation Formats

Mutch, Joshua, Chen, Wei-Chih, Went, Preston, Qian, Tiema, Wilson, Ilham Zaky, Andreev, Anton, Chen, Cheng-Chien, and Chu, Jiun-Haw. Evidence for a strain-tuned topological phase transition in ZrTe5. United States: N. p., 2019. Web. https://doi.org/10.1126/sciadv.aav9771.
Mutch, Joshua, Chen, Wei-Chih, Went, Preston, Qian, Tiema, Wilson, Ilham Zaky, Andreev, Anton, Chen, Cheng-Chien, & Chu, Jiun-Haw. Evidence for a strain-tuned topological phase transition in ZrTe5. United States. https://doi.org/10.1126/sciadv.aav9771
Mutch, Joshua, Chen, Wei-Chih, Went, Preston, Qian, Tiema, Wilson, Ilham Zaky, Andreev, Anton, Chen, Cheng-Chien, and Chu, Jiun-Haw. Fri . "Evidence for a strain-tuned topological phase transition in ZrTe5". United States. https://doi.org/10.1126/sciadv.aav9771. https://www.osti.gov/servlets/purl/1609907.
@article{osti_1609907,
title = {Evidence for a strain-tuned topological phase transition in ZrTe5},
author = {Mutch, Joshua and Chen, Wei-Chih and Went, Preston and Qian, Tiema and Wilson, Ilham Zaky and Andreev, Anton and Chen, Cheng-Chien and Chu, Jiun-Haw},
abstractNote = {A phase transition between topologically distinct insulating phases involves closing and reopening the bandgap. Near the topological phase transition, the bulk energy spectrum is characterized by a massive Dirac dispersion, where the bandgap plays the role of mass. We report measurements of strain dependence of electrical transport properties of ZrTe5, which is known to host massive Dirac fermions in the bulk due to its proximity to a topological phase transition. We observe that the resistivity exhibits a pronounced minimum at a critical strain. We further find that the positive longitudinal magnetoconductance becomes maximal at the critical strain. This nonmonotonic strain dependence is consistent with the switching of sign of the Dirac mass and, hence, a strain-tuned topological phase transition in ZrTe5.},
doi = {10.1126/sciadv.aav9771},
journal = {Science Advances},
number = 8,
volume = 5,
place = {United States},
year = {2019},
month = {8}
}

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Cited by: 9 works
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    Works referencing / citing this record:

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