Landau level spectroscopy of Bi 2 Te 3
Physical review(2020)
摘要
Bismuth telluride is a widely explored material in the condensed matter community and one of the first experimentally identified as a topological insulator. Nevertheless, despite considerable effort, the bulk electronic band structure of Bi${}_{2}$Te${}_{3}$ is known only partially. Here, the authors present a magneto-optical study of Bi${}_{2}$Te${}_{3}$, which provides one with compelling evidence that bismuth telluride is a direct-gap semiconductor, with a multiple valley degeneracy and charge carriers that closely resemble massive Dirac electrons.
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