Pressure Induced Topological Quantum Phase Transition in Weyl Semimetal Td-MoTe2
Abstract
We report the temperature and pressure (pmax≃1.5 GPa) evolution of the crystal structure of the Weyl semimetal Td-MoTe2 by combination of neutron diffraction and the X-ray total scattering experiments. We find that the fundamental non-centrosymmetric structure Td is fully suppressed and transforms into a centrosymmertic 1T' structure at a critical pressure of pcr ~ 1.2–1.4 GPa. This is strong evidence for a pressure induced quantum phase transition (QPT) between topological to a trivial electronic state. Although the topological QPT has strong effect on magnetoresistance, it is interesting that the superconducting (SC) critical temperature Tc, the superfluid density, and the SC gap all change smoothly and continuously across pcr and no sudden effects are seen concomitantly with the suppression of the Td structure. This implies that the Tc, and thus the SC pairing strength, is unaffected by the topological QPT. However, the QPT requires the change in the SC gap symmetry from non-trivial s+- to a trivial s++ state, which we discuss in this work. Our systematic characterizations of the structure and SC properties associated with the topological QPT provide deep insight into the pressure induced phase diagram in this topological quantum material.
- Authors:
-
[1];
[2];
[2];
[4];
- Paul Scherrer Inst. (PSI), Villigen (Switzerland). Lab. for Muon Spin Spectroscopy
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Univ. of Zurich (Switzerland)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Univ. of Wisconsin, Madison, WI (United States)
- Princeton Univ., NJ (United States). Lab. for Topological Quantum Matter and Spectroscopy
- Columbia Univ., New York, NY (United States)
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); Swiss National Science Foundation (SNF)
- OSTI Identifier:
- 1638067
- Alternate Identifier(s):
- OSTI ID: 1828269
- Report Number(s):
- BNL-216128-2020-JAAM
Journal ID: ISSN 0031-9015;1347-4073; TRN: US2201712
- Grant/Contract Number:
- SC0012704; DMR-1610633; P300P2-177832; PZ00P2-174015; AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of the Physical Society of Japan
- Additional Journal Information:
- Journal Volume: 89; Journal Issue: 9; Journal ID: ISSN 0031-9015
- Publisher:
- Physical Society of Japan
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Guguchia, Zurab, dos Santos, Antonio M., von Rohr, Fabian O., Molaison, Jamie J., Banerjee, Soham, Rhodes, Daniel, Yin, Jiaxin, Khasanov, Rustem, Hone, James, Uemura, Yasutomo J., Hasan, M. Zahid, Luetkens, Hubertus, Bozin, Emil S., and Amato, Alex. Pressure Induced Topological Quantum Phase Transition in Weyl Semimetal Td-MoTe2. United States: N. p., 2020.
Web. doi:10.7566/jpsj.89.094707.
Guguchia, Zurab, dos Santos, Antonio M., von Rohr, Fabian O., Molaison, Jamie J., Banerjee, Soham, Rhodes, Daniel, Yin, Jiaxin, Khasanov, Rustem, Hone, James, Uemura, Yasutomo J., Hasan, M. Zahid, Luetkens, Hubertus, Bozin, Emil S., & Amato, Alex. Pressure Induced Topological Quantum Phase Transition in Weyl Semimetal Td-MoTe2. United States. https://doi.org/10.7566/jpsj.89.094707
Guguchia, Zurab, dos Santos, Antonio M., von Rohr, Fabian O., Molaison, Jamie J., Banerjee, Soham, Rhodes, Daniel, Yin, Jiaxin, Khasanov, Rustem, Hone, James, Uemura, Yasutomo J., Hasan, M. Zahid, Luetkens, Hubertus, Bozin, Emil S., and Amato, Alex. Fri .
"Pressure Induced Topological Quantum Phase Transition in Weyl Semimetal Td-MoTe2". United States. https://doi.org/10.7566/jpsj.89.094707. https://www.osti.gov/servlets/purl/1638067.
@article{osti_1638067,
title = {Pressure Induced Topological Quantum Phase Transition in Weyl Semimetal Td-MoTe2},
author = {Guguchia, Zurab and dos Santos, Antonio M. and von Rohr, Fabian O. and Molaison, Jamie J. and Banerjee, Soham and Rhodes, Daniel and Yin, Jiaxin and Khasanov, Rustem and Hone, James and Uemura, Yasutomo J. and Hasan, M. Zahid and Luetkens, Hubertus and Bozin, Emil S. and Amato, Alex},
abstractNote = {We report the temperature and pressure (pmax≃1.5 GPa) evolution of the crystal structure of the Weyl semimetal Td-MoTe2 by combination of neutron diffraction and the X-ray total scattering experiments. We find that the fundamental non-centrosymmetric structure Td is fully suppressed and transforms into a centrosymmertic 1T' structure at a critical pressure of pcr ~ 1.2–1.4 GPa. This is strong evidence for a pressure induced quantum phase transition (QPT) between topological to a trivial electronic state. Although the topological QPT has strong effect on magnetoresistance, it is interesting that the superconducting (SC) critical temperature Tc, the superfluid density, and the SC gap all change smoothly and continuously across pcr and no sudden effects are seen concomitantly with the suppression of the Td structure. This implies that the Tc, and thus the SC pairing strength, is unaffected by the topological QPT. However, the QPT requires the change in the SC gap symmetry from non-trivial s+- to a trivial s++ state, which we discuss in this work. Our systematic characterizations of the structure and SC properties associated with the topological QPT provide deep insight into the pressure induced phase diagram in this topological quantum material.},
doi = {10.7566/jpsj.89.094707},
journal = {Journal of the Physical Society of Japan},
number = 9,
volume = 89,
place = {United States},
year = {Fri Aug 07 00:00:00 EDT 2020},
month = {Fri Aug 07 00:00:00 EDT 2020}
}
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