Temperature evolution of topological surface states in bismuth selenide thin films studied using terahertz spectroscopy
We have measured the terahertz (THz) conductance of a 23 quintuple layer thick film of bismuth selenide (Bi2Se3) and found signatures for topological surface states (TSSs) below 50 K. We provide evidence for a topological phase transition as a function of lattice temperature by optical means. In thi...
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SPIE
2017
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