Emergence of topologically protected states in the MoTe2 Weyl semimetal with layer-stacking order

Schneeloch, John A.; Duan, Chunruo; Yang, Junjie; Liu, Jun; Wang, Xiaoping; Louca, Despina

doi:10.1103/PhysRevB.99.161105

Title: Emergence of topologically protected states in the ${MoTe}_{2}$ Weyl semimetal with layer-stacking order

Journal Article · Mon Apr 08 00:00:00 EDT 2019 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.99.161105· OSTI ID:1559585

Schneeloch, John A. ^[1]; Duan, Chunruo ^[1]; Yang, Junjie ^[2]; Liu, Jun ^[3];

^[4]; Louca, Despina ^[1]

Univ. of Virginia, Charlottesville, VA (United States)
Univ. of Virginia, Charlottesville, VA (United States); Central Michigan Univ., Mount Pleasant, MI (United States)
Ames Lab., Ames, IA (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Electronic tunability in crystals with weakly bound layers can be achieved through layer stacking order. One such example is MoTe₂, where the low-temperature orthorhombic T_d phase is topological and host to Weyl quasiparticles. The transition mechanism to the nontrivial topology is elucidated by single-crystal neutron diffraction. Upon cooling from the monoclinic 1T' to the T_d phase, diffuse scattering accompanies the transition, arising from random, in-plane layer displacements, and dissipates upon entering the T_d phase. Here, diffuse scattering is observed only in the H0L plane due to irreversible layer shifts along the c axis that break the centrosymmetry of the monoclinic lattice.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC05-00OR22725; FG02-01ER45927

OSTI ID:: 1559585

Alternate ID(s):: OSTI ID: 1505662

Journal Information:: Physical Review B, Vol. 99, Issue 16; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 9 works

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Electronic band tuning under pressure in MoTe2 topological semimetal Dissanayake, Sachith; Duan, Chunruo; Yang, Junjie npj Quantum Materials, Vol. 4, Issue 1 https://doi.org/10.1038/s41535-019-0187-7	journal	August 2019

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