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Title: Elastic and electronic tuning of magnetoresistance in MoTe2

Journal Article · · Science Advances

Quasi–two-dimensional transition metal dichalcogenides exhibit dramatic properties that may transform electronic and photonic devices. We report on how the anomalously large magnetoresistance (MR) observed under high magnetic field in MoTe2, a type II Weyl semimetal, can be reversibly controlled under tensile strain. The MR is enhanced by as much as ~30% at low temperatures and high magnetic fields when uniaxial strain is applied along the a crystallographic direction and reduced by about the same amount when strain is applied along the b direction. We show that the large in-plane electric anisotropy is coupled with the structural transition from the 1T' monoclinic to the Td orthorhombic Weyl phase. A shift of the Td-1T' phase boundary is achieved by minimal tensile strain. The sensitivity of the MR to tensile strain suggests the possibility of a nontrivial spin-orbital texture of the electron and hole pockets in the vicinity of Weyl points. Our ab initio calculations show a significant orbital mixing on the Fermi surface, which is modified by the tensile strains.

Research Organization:
Univ. of Virginia, Charlottesville, VA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
FG02-01ER45927
OSTI ID:
1499951
Journal Information:
Science Advances, Vol. 3, Issue 12; ISSN 2375-2548
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 31 works
Citation information provided by
Web of Science

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Cited By (15)

Metal Oxide Nanocomposites: A Perspective from Strain, Defect, and Interface journal October 2018
Polar and phase domain walls with conducting interfacial states in a Weyl semimetal MoTe2 journal September 2019
Electronic band tuning under pressure in MoTe2 topological semimetal journal August 2019
An ultrafast symmetry switch in a Weyl semimetal journal January 2019
Origin of extremely large magnetoresistance in the candidate type-II Weyl semimetal MoTe2−x journal September 2018
Mechanical properties of monolayer ternary transitional metal dichalogenides MoS 2 x Te 2(1 −  x ) : A molecular dynamics study journal December 2019
Mechanical properties of 1 T -, 1 T ′-, and 1 H -MX 2 monolayers and their 1 H /1 T ′-MX 2 (M = Mo, W and X = S, Se, Te) heterostructures journal December 2019
Electrically tuneable nonlinear anomalous Hall effect in two-dimensional transition-metal dichalcogenides WTe 2 and MoTe 2 journal July 2018
Emergence of topologically protected states in the MoTe 2 Weyl semimetal with layer-stacking order journal April 2019
Optical evidence of the type-II Weyl semimetals MoTe 2 and WTe 2 journal May 2019
Spin-Resolved Electronic Response to the Phase Transition in MoTe 2 journal October 2018
Mechanical control of crystal symmetry and superconductivity in Weyl semimetal MoTe 2 journal July 2018
Mechanical properties of monolayer ternary transitional metal dichalogenides MoS2xTe2(1-x): A molecular dynamics study text January 2019
Electrically tuneable nonlinear anomalous Hall effect in two-dimensional transition-metal dichalcogenides WTe2 and MoTe2 text January 2018
Polar and phase domain walls with conducting interfacial states in a Weyl semimetal MoTe2 text January 2019

Figures / Tables (4)


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