Faraday Rotation Due to Surface States in the Topological Insulator (Bi1-xSbx)2Te3

Yinming Shao*, Kirk W. Post, Jhih Sheng Wu, Siyuan Dai, Alex J. Frenzel, Anthony R. Richardella, Joon Sue Lee, Nitin Samarth, Michael M. Fogler, Alexander V. Balatsky, Dmitri E. Kharzeev, D. N. Basov

*Corresponding author for this work

研究成果: Article同行評審

18 引文 斯高帕斯(Scopus)

摘要

Using magneto-infrared spectroscopy, we have explored the charge dynamics of (Bi,Sb)2Te3 thin films on InP substrates. From the magneto-transmission data we extracted three distinct cyclotron resonance (CR) energies that are all apparent in the broad band Faraday rotation (FR) spectra. This comprehensive FR-CR data set has allowed us to isolate the response of the bulk states from the intrinsic surface states associated with both the top and bottom surfaces of the film. The FR data uncovered that electron- and hole-type Dirac Fermions reside on opposite surfaces of our films, which paves the way for observing many exotic quantum phenomena in topological insulators.

原文English
頁(從 - 到)980-984
頁數5
期刊Nano letters
17
發行號2
DOIs
出版狀態Published - 8 二月 2017

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