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Title: Topological Phase Transition and Phonon-Space Dirac Topology Surfaces in ZrTe5

Journal Article · · Physical Review Letters
 [1];  [2];  [1];  [1]; ORCiD logo [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
  2. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.; Jilin Univ., Changchun (China). State Key Lab. of Superhard Materials

We use first-principles methods to demonstrate that, in ZrTe5, a layered van der Waals material like graphite, atomic displacements corresponding to five of the six zone-center Ag (symmetry-preserving) phonon modes can drive a topological transition from a strong to a weak topological insulator with a Dirac semimetal state emerging at the transition, giving rise to a Dirac topology surface in the multidimensional space formed by the A g phonon modes. This implies that the topological transition in ZrTe5, can be realized with many different settings of external stimuli capable of penetrating through the phonon-space Dirac surface without breaking the crystallographic symmetry. Furthermore, we predict that domains with effective mass of opposite signs can be created by laser pumping and will host Weyl modes of opposite chirality propagating along the domain boundaries. Studying phonon-space topology surfaces provides a new route to understanding and utilizing the exotic physical properties of ZrTe5, and related quantum materials.

Research Organization:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704
OSTI ID:
1749891
Report Number(s):
BNL-220749-2020-JAAM; TRN: US2205442
Journal Information:
Physical Review Letters, Vol. 126, Issue 1; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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