Elastic and electronic tuning of magnetoresistance in MoTe${}_2$

Abstract

Quasi-two dimensional transition metal dichalcogenides (TMD) 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 MoTe${}_2$, 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 indeed show a significant orbital mixing on the Fermi surface, which is modified by the tensile strains.

arXiv comment20 pages, 4+5 figures

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Cited by in corpus (13)

• Electrically tuneable nonlinear anomalous Hall effect in two-dimensional transition-metal dichalcogenides WTe2 and MoTe2
• Polar and phase domain walls with conducting interfacial states in a Weyl semimetal MoTe2
• Mechanical control of crystal symmetry and superconductivity in Weyl semimetal MoTe${}_2$
• Optical evidence of type-II Weyl semimetals MoTe${}_2$ and WTe${}_2$
• T${}_d$ to 1T${}^{\prime }$ structural phase transition in WTe${}_2$ Weyl semimetal
• Spin-resolved electronic response to the phase transition in MoTe${}_2$
• Chirality flip of Weyl nodes and its manifestation in strained MoTe${}_2$
• Evolution of the structural transition in Mo${}_{1-x}$W${}_x$Te${}_2$
• Emergence of topologically protected states in MoTe${}_2$ Weyl semimetal with layer stacking order
• Electronic structure of molecular beam epitaxy grown 1T${}^{\prime }$-MoTe${}_2$ film and strain effect
• Harnessing physical entropy noise in structurally metastable 1T' molybdenum ditelluride for true random number generation
• Polarization-resolved broadband time-resolved optical spectroscopy for complex materials: application to the case of MoTe${}_2$ polytypes
• Superconducting pairing symmetry in MoTe${}_2$