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Spin-resolved electronic response to the phase transition in MoTe$_2$
- Source :
- Phys. Rev. Lett. 121, 156401 (2018)
- Publication Year :
- 2018
-
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.
- Subjects :
- Condensed Matter - Materials Science
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. Lett. 121, 156401 (2018)
- Publication Type :
- Report
- Accession number :
- edsarx.1807.00339
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevLett.121.156401