2018
DOI: 10.1038/s41598-018-32387-1
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Origin of extremely large magnetoresistance in the candidate type-II Weyl semimetal MoTe2−x

Abstract: The recent observation of extremely large magnetoresistance (MR) in the transition-metal dichalcogenide MoTe2 has attracted considerable interest due to its potential technological applications as well as its relationship with novel electronic states predicted for a candidate type-II Weyl semimetal. In order to understand the origin of the MR, the electronic structure of MoTe2−x (x = 0.08) is systematically tuned by application of pressure and probed via its Hall and longitudinal conductivities. With increasin… Show more

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Cited by 45 publications
(24 citation statements)
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“…253 Later, the XMR behaviour was discovered in the Td phase of MoTe 2 . 254,255 Furthermore, the magnetoresistance observed in Td MoTe 2 in high magnetic fields can be tuned by an applied tensile strain (0.5%). 256 At low temperatures and in high magnetic fields, the magnetoresistance variation approaches 30% under uniaxial tensile strain perpendicular to the zigzag chain direction, while the strain along the zigzag chain direction effectively suppresses the magnetoresistance.…”
Section: How Stable the Metastable 1t(1t 0 ) Phases Are?mentioning
confidence: 99%
“…253 Later, the XMR behaviour was discovered in the Td phase of MoTe 2 . 254,255 Furthermore, the magnetoresistance observed in Td MoTe 2 in high magnetic fields can be tuned by an applied tensile strain (0.5%). 256 At low temperatures and in high magnetic fields, the magnetoresistance variation approaches 30% under uniaxial tensile strain perpendicular to the zigzag chain direction, while the strain along the zigzag chain direction effectively suppresses the magnetoresistance.…”
Section: How Stable the Metastable 1t(1t 0 ) Phases Are?mentioning
confidence: 99%
“…14 while magnetoresistance goes down. 22 The same nodes could not be traced in the band dispersions from calculations performed at higher pressures. At pressure values exceeding 1.2 GPa, the 1T′ symmetry is centrosymmetric and no Weyl nodes are expected.…”
Section: Introductionmentioning
confidence: 95%
“…Above 1 GPa, a broad transition from the T d to 1T′ with apparent phase coexistence is observed. Coupled with the transition to the monoclinic phase under pressure is suppression of the magnetoresistance 22 which may be linked to the disappearance of the Weyl nodes. Shown in Fig.…”
Section: Introductionmentioning
confidence: 99%
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“…In the second metastable polymorph, i.e ., 1T′-MoTe 2 , Mo is in the center of a distorted octahedron of Te atoms, resulting in a monoclinic structure or distorted 1T-MoTe 2 . 13 1T′-MoTe 2 is a semimetal 14 that exhibits large magnetoresistance 15 and superconductivity. 16 1T′-MoTe 2 is also expected to be a type-II Weyl semimetal in bulk form 17 and, as a monolayer, a 2D topological and large-gap quantum spin Hall (QSH) insulator, 18 properties that can be exploited in spintronic and quantum computational applications.…”
mentioning
confidence: 99%