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- W3201804538 abstract "Using high-resolution angle-resolved and time-resolved photoemission spectroscopy, we have studied the low-energy band structures in occupied and unoccupied states of three ternary compounds GeBi 2 Te 4 , SnBi 2 Te 4 and Sn 0.571 Bi 2.286 Se 4 near the Fermi level. In previously confirmed topological insulator GeBi 2 Te 4 compounds, we confirmed the existence of the Dirac surface state and found that the bulk energy gap is much larger than that in the first-principles calculations. In SnBi 2 Te 4 compounds, the Dirac surface state was observed, consistent with the first-principles calculations, indicating that it is a topological insulator. The experimental detected bulk gap is a little bit larger than that in calculations. In Sn 0.571 Bi 2.286 Se 4 compounds, our measurements suggest that this nonstoichiometric compound is a topological insulator although the stoichiometric SnBi 2 Se 4 compound was proposed to be topological trivial." @default.
- W3201804538 created "2021-10-11" @default.
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- W3201804538 date "2021-12-01" @default.
- W3201804538 modified "2023-10-16" @default.
- W3201804538 title "Topological Dirac surface states in ternary compounds GeBi<sub>2</sub>Te<sub>4</sub>, SnBi<sub>2</sub>Te<sub>4</sub> and Sn<sub>0.571</sub>Bi<sub>2.286</sub>Se<sub>4</sub> *" @default.
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- W3201804538 doi "https://doi.org/10.1088/1674-1056/ac2b92" @default.
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