Spin-resolved electronic response to the phase transition in MoTe${}_2$

Abstract

The semimetal MoTe${}_2$ is studied by spin- and angle- resolved photoemission spectroscopy to probe the detailed electronic structure underlying its broad range of response behavior. A novel spin-texture is uncovered in the bulk Fermi surface of the non-centrosymmetric structural phase that is consistent with first-principles calculations. The spin-texture is three-dimensional, both in terms of momentum dependence and spin-orientation, and is not completely suppressed above the centrosymmetry-breaking transition temperature. Two types of surface Fermi arc are found to persist well above the transition temperature. The appearance of a large Fermi arc depends strongly on thermal history, and the electron quasiparticle lifetimes are greatly enhanced in the initial cooling. The results indicate that polar instability with strong electron-lattice interactions exists near the surface when the bulk is largely in a centrosymmetric phase.

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Cited by in corpus (13)

• Topological quantum materials from the viewpoint of chemistry
• Transport evidence of asymmetric spin-orbit coupling in few$-$layer superconducting 1Td$-$MoTe${}_2$
• Engineering Weyl phases and nonlinear Hall effects in T${}_d$-MoTe${}_2$
• Spin-Resolved Topology and Partial Axion Angles in Three-Dimensional Insulators
• Spin- and angle-resolved photoemission on topological materials
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• Detection of hole pockets in the candidate type-II Weyl semimetal MoTe${}_2$ from Shubnikov-de Haas quantum oscillations
• Appearance of T${}_d^{\ast }$ phase across the T${}_d$-1T${}^{\prime }$ phase boundary in Weyl semimetal MoTe${}_2$
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• Surface band characters of Weyl semimetal candidate material MoTe${}_2$ revealed by one-step ARPES theory
• Geometry-induced spin-filtering in photoemission maps from WTe${}_2$ surface states
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