Quantum oscillations from networked topological interfaces in a Weyl semimetal
Abstract
Layered transition metal chalcogenides are promising hosts of electronic Weyl nodes and topological superconductivity. MoTe2 is a striking example that harbors both noncentrosymmetric Td and centrosymmetric T’ phases, both of which have been identified as topologically nontrivial. Applied pressure tunes the structural transition separating these phases to zero temperature, stabilizing a mixed Td–T’ matrix that entails a network of interfaces between the two nontrivial topological phases. Here, we show that this critical pressure range is characterized by distinct coherent quantum oscillations, indicating that the difference in topology between topologically nonvtrivial Td and T’ phases gives rise to an emergent electronic structure: a network of topological interfaces. A rare combination of topologically nontrivial electronic structures and locked-in transformation barriers leads to this counterintuitive situation, wherein quantum oscillations can be observed in a structurally inhomogeneous material. These results further open the possibility of stabilizing multiple topological phases coexisting with superconductivity.
- Authors:
-
[1];
[1];
[3];
[2];
[3];
[1]
- National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Center for Neutron Research; Univ. of Maryland, College Park, MD (United States)
- National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Center for Neutron Research
- Univ. of Maryland, College Park, MD (United States)
- National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Center for Neutron Research; Univ. of Maryland, College Park, MD (United States); Washington Univ., St. Louis, MO (United States)
- Publication Date:
- Research Org.:
- Univ. of Maryland, College Park, MD (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); National Institute of Standards and Technology (NIST); Gordon and Betty Moore Foundation
- OSTI Identifier:
- 1714357
- Grant/Contract Number:
- SC0019154; DMR-0454672; 70NANB15H261; GBMF4419
- Resource Type:
- Accepted Manuscript
- Journal Name:
- npj Quantum Materials
- Additional Journal Information:
- Journal Volume: 5; Journal Issue: 1; Journal ID: ISSN 2397-4648
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; electronic properties and materials; topological matter
Citation Formats
Liu, I-Lin, Heikes, Colin, Yildirim, Taner, Eckberg, Chris, Metz, Tristin, Kim, Hyunsoo, Ran, Sheng, Ratcliff, William D., Paglione, Johnpierre, and Butch, Nicholas P. Quantum oscillations from networked topological interfaces in a Weyl semimetal. United States: N. p., 2020.
Web. doi:10.1038/s41535-020-00264-8.
Liu, I-Lin, Heikes, Colin, Yildirim, Taner, Eckberg, Chris, Metz, Tristin, Kim, Hyunsoo, Ran, Sheng, Ratcliff, William D., Paglione, Johnpierre, & Butch, Nicholas P. Quantum oscillations from networked topological interfaces in a Weyl semimetal. United States. https://doi.org/10.1038/s41535-020-00264-8
Liu, I-Lin, Heikes, Colin, Yildirim, Taner, Eckberg, Chris, Metz, Tristin, Kim, Hyunsoo, Ran, Sheng, Ratcliff, William D., Paglione, Johnpierre, and Butch, Nicholas P. Mon .
"Quantum oscillations from networked topological interfaces in a Weyl semimetal". United States. https://doi.org/10.1038/s41535-020-00264-8. https://www.osti.gov/servlets/purl/1714357.
@article{osti_1714357,
title = {Quantum oscillations from networked topological interfaces in a Weyl semimetal},
author = {Liu, I-Lin and Heikes, Colin and Yildirim, Taner and Eckberg, Chris and Metz, Tristin and Kim, Hyunsoo and Ran, Sheng and Ratcliff, William D. and Paglione, Johnpierre and Butch, Nicholas P.},
abstractNote = {Layered transition metal chalcogenides are promising hosts of electronic Weyl nodes and topological superconductivity. MoTe2 is a striking example that harbors both noncentrosymmetric Td and centrosymmetric T’ phases, both of which have been identified as topologically nontrivial. Applied pressure tunes the structural transition separating these phases to zero temperature, stabilizing a mixed Td–T’ matrix that entails a network of interfaces between the two nontrivial topological phases. Here, we show that this critical pressure range is characterized by distinct coherent quantum oscillations, indicating that the difference in topology between topologically nonvtrivial Td and T’ phases gives rise to an emergent electronic structure: a network of topological interfaces. A rare combination of topologically nontrivial electronic structures and locked-in transformation barriers leads to this counterintuitive situation, wherein quantum oscillations can be observed in a structurally inhomogeneous material. These results further open the possibility of stabilizing multiple topological phases coexisting with superconductivity.},
doi = {10.1038/s41535-020-00264-8},
journal = {npj Quantum Materials},
number = 1,
volume = 5,
place = {United States},
year = {Mon Sep 07 00:00:00 EDT 2020},
month = {Mon Sep 07 00:00:00 EDT 2020}
}
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