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Title: Td to 1T' structural phase transition in the WTe2 Weyl semimetal

Abstract

Elastic neutron scattering on a single crystal combined with powder x-ray diffraction measurements were carried out to investigate how the crystal structure evolves as a function of temperature in the Weyl semimetal WTe2. Here, a sharp transition from the low-temperature orthorhombic phase Td to the high-temperature monoclinic phase 1T' was observed at ambient pressure in the single crystal near ~565 K. Unlike in MoTe2, the solid-solid transition from Td to 1T' occurs without the cell doubling of the intermediate Td* phase with AABB (or ABBA) layer stacking. In powders, however, the thermal transition from the Td to the 1T' phase was broadened and a two-phase coexistence was observed until 700 K, well above the structural transition.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2];  [1]
  1. University of Virginia, Charlottesville, VA (United States)
  2. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); University of Tennessee, Knoxville, TN (United States)
Publication Date:
Research Org.:
Univ. of Virginia, Charlottesville, VA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1652426
Grant/Contract Number:  
FG02-01ER45927
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 102; Journal Issue: 6; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Structural phase transition; Weyl semimetal; Neutron scattering

Citation Formats

Tao, Yu, Schneeloch, John A., Aczel, Adam A., and Louca, Despina. Td to 1T' structural phase transition in the WTe2 Weyl semimetal. United States: N. p., 2020. Web. doi:10.1103/physrevb.102.060103.
Tao, Yu, Schneeloch, John A., Aczel, Adam A., & Louca, Despina. Td to 1T' structural phase transition in the WTe2 Weyl semimetal. United States. doi:10.1103/physrevb.102.060103.
Tao, Yu, Schneeloch, John A., Aczel, Adam A., and Louca, Despina. Mon . "Td to 1T' structural phase transition in the WTe2 Weyl semimetal". United States. doi:10.1103/physrevb.102.060103.
@article{osti_1652426,
title = {Td to 1T' structural phase transition in the WTe2 Weyl semimetal},
author = {Tao, Yu and Schneeloch, John A. and Aczel, Adam A. and Louca, Despina},
abstractNote = {Elastic neutron scattering on a single crystal combined with powder x-ray diffraction measurements were carried out to investigate how the crystal structure evolves as a function of temperature in the Weyl semimetal WTe2. Here, a sharp transition from the low-temperature orthorhombic phase Td to the high-temperature monoclinic phase 1T' was observed at ambient pressure in the single crystal near ~565 K. Unlike in MoTe2, the solid-solid transition from Td to 1T' occurs without the cell doubling of the intermediate Td* phase with AABB (or ABBA) layer stacking. In powders, however, the thermal transition from the Td to the 1T' phase was broadened and a two-phase coexistence was observed until 700 K, well above the structural transition.},
doi = {10.1103/physrevb.102.060103},
journal = {Physical Review B},
number = 6,
volume = 102,
place = {United States},
year = {2020},
month = {8}
}

Journal Article:
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