Prediction of Weyl semimetal in orthorhombic<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>MoTe</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math>

By Yan Sun, Shu-chun Wu, Mazhar N. Ali, Claudia Felser, Binghai Yan. Physical review B, 2015

422 citations recorded by the source corpus.

We investigate the orthorhombic phase $({T}_{d})$ of the layered transition-metal dichalcogenide ${\mathrm{MoTe}}_{2}$ as a Weyl semimetal candidate. ${\mathrm{MoTe}}_{2}$ exhibits four pairs of Weyl points lying slightly above $(\ensuremath{\sim}6\phantom{\rule{0.16em}{0ex}}\mathrm{meV})$ the Fermi energy in the bulk band structure. Different from its cousin ${\mathrm{WTe}}_{2}$, which was recently predicted to be a type-II Weyl semimetal, the spacing between each pair of Weyl points is found to be as large as 4% of the reciprocal lattice in ${\mathrm{MoTe}}_{2}$ (six times larger than that of ${\mathrm{WTe}}_{2}$). When projected onto the surface, the Weyl points are connected by Fermi arcs, which can be easily accessed by angle-resolved photoemission spectroscopy due to the large Weyl point separation. In addition, we show that the correlation effect or strain can drive ${\mathrm{MoTe}}_{2}$ from a type-II to a type-I Weyl semimetal.

Subfields: Atomic and Molecular Physics, and Optics, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/827335aff7e09f3e62cbfc63271a499c071d48f3

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In Atomic and Molecular Physics, and Optics

In Materials Chemistry

Citations in the corpus

Fermi-arc diversity on surface terminations of the magnetic Weyl semimetal Co3Sn2S2 (2019, background): “In contrast to inversion symmetry broken Weyl semimetals, predicted to exist in a wide variety of compounds (6,20) and some of which realized experimentally (21-24), there are only a few candidates of magnetically ordered materials for the realization of time reversal symmetry broken Weyl semimetals”
Fermi Arcs and Their Topological Character in the Candidate Type-II Weyl Semimetal MoTe 2 (2016, methodology): “[6, 30] was predicted to have 8 type-II Weyl points, appearing in the kz = 0 plane [6], accompanied by 16 off-plane Weyl points [7], the structure reported in the work of Ref.”
Weyl and Dirac semimetals in three-dimensional solids (2017, methodology): “Calculations using only slightly smaller lattice parameters showed that two pairs were annihilated by merging along the Γ − X line leaving only two pairs of Weyl points (Sun et al., 2015a).”