Santos-Cottin, David Martino, Edoardo Le Mardelé, Florian Witteveen, C. Rohr, Fabian O. von Homes, C. C. Rukelj, Z. Akrap, Ana 2020-02-10 Molybdenum ditelluride, MoTe2, is a versatile material where the topological phase can be readily tuned by manipulating the associated structural phase transition. The fine details of the band structure of MoTe2, key to understanding its topological properties, have proven difficult to disentangle experientially due to the multiband character of the material. Through experimental optical conductivity spectra, we detect two strong low-energy interband transitions. Both are linked to excitations between spin-orbit split bands. The lowest interband transition shows a strong thermal shift, pointing to a chemical potential that dramatically decreases with temperature. With the help of ab initio calculations and a simple two-band model, we give qualitative and quantitative explanations of the main features in the temperature-dependent optical spectra up to 400 meV. application/pdf https://folia.unifr.ch/global/documents/308341 https://folia.unifr.ch/documents/308341/files/akr_lee.pdf https://folia.unifr.ch/documents/308341/files/akr_lee_sm.pdf eng info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevMaterials.4.021201 info:eu-repo/semantics/openAccess License undefined Physical Review Materials. - 2020, vol. 4, no. 2, p. 021201 info:eu-repo/classification/udc/53 Low-energy excitations in type-II Weyl semimetal ${T}_{d}\text{\ensuremath{-}}{\mathrm{MoTe}}_{2}$ evidenced through optical conductivity http://purl.org/coar/resource_type/c_6501