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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on TaSb2 by Materials Project

TaSb2 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. Ta5+ is bonded in a 8-coordinate geometry to eight Sb+2.50- atoms. There are a spread of Ta–Sb bond distances ranging from 2.87–3.01 Å. There are two inequivalent Sb+2.50- sites. In the first Sb+2.50- site, Sb+2.50- is bonded in a 3-coordinate geometry to three equivalent Ta5+ and three equivalent Sb+2.50- atoms. There are one shorter (2.82 Å) and two longer (3.07 Å) Sb–Sb bond lengths. In the second Sb+2.50- site, Sb+2.50- is bonded in a 5-coordinate geometry to five equivalent Ta5+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2024

Topological surface states of semimetal TaSb 2

Topological surface states, protected by the global symmetry of the materials, are the keys to understanding various novel electrical, magnetic, and optical properties. TaSb 2 is a newly discovered topological material with unique transport phenomena, including negative magnetoresistance and resistivity plateau, whose microscopic understanding is yet to be reached. In this study, we investigate the electronic band structure of TaSb 2 using angle-resolved photoemission spectroscopy and density functional theory. Our analyses reveal distinct bulk and surface states in TaSb 2 , providing direct evidence of its topological nature. Notably, surface states predominate the electronic contribution near the Fermi level, while bulk bands are mostly located at higher binding energies. Our study underlines the importance of systematic investigations into the electronic structures of topological materials, offering insights into their fundamental properties and potential applications in future technologies.

36 MATERIALS SCIENCE↗