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

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

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.

Original languageEnglish (US)
Pages (from-to)980-984
Number of pages5
JournalNano letters
Volume17
Issue number2
DOIs
StatePublished - Feb 8 2017

Fingerprint

Faraday effect
Surface states
Cyclotron resonance
insulators
cyclotron resonance
Fermions
data transmission
Data communication systems
Infrared spectroscopy
fermions
infrared spectroscopy
broadband
Thin films
Electrons
Substrates
thin films
electrons
energy

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

Shao, Yinming ; Post, Kirk W. ; Wu, Jhih Sheng ; Dai, Siyuan ; Frenzel, Alex J. ; Richardella, Anthony R. ; Lee, Joon Sue ; Samarth, Nitin ; Fogler, Michael M. ; Balatsky, Alexander V. ; Kharzeev, Dmitri E. ; Basov, D. N. / Faraday Rotation Due to Surface States in the Topological Insulator (Bi1-xSbx)2Te3. In: Nano letters. 2017 ; Vol. 17, No. 2. pp. 980-984.
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abstract = "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.",
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Shao, Y, Post, KW, Wu, JS, Dai, S, Frenzel, AJ, Richardella, AR, Lee, JS, Samarth, N, Fogler, MM, Balatsky, AV, Kharzeev, DE & Basov, DN 2017, 'Faraday Rotation Due to Surface States in the Topological Insulator (Bi1-xSbx)2Te3', Nano letters, vol. 17, no. 2, pp. 980-984. https://doi.org/10.1021/acs.nanolett.6b04313

Faraday Rotation Due to Surface States in the Topological Insulator (Bi1-xSbx)2Te3. / Shao, Yinming; Post, Kirk W.; Wu, Jhih Sheng; Dai, Siyuan; Frenzel, Alex J.; Richardella, Anthony R.; Lee, Joon Sue; Samarth, Nitin; Fogler, Michael M.; Balatsky, Alexander V.; Kharzeev, Dmitri E.; Basov, D. N.

In: Nano letters, Vol. 17, No. 2, 08.02.2017, p. 980-984.

Research output: Contribution to journalArticle

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AU - Shao, Yinming

AU - Post, Kirk W.

AU - Wu, Jhih Sheng

AU - Dai, Siyuan

AU - Frenzel, Alex J.

AU - Richardella, Anthony R.

AU - Lee, Joon Sue

AU - Samarth, Nitin

AU - Fogler, Michael M.

AU - Balatsky, Alexander V.

AU - Kharzeev, Dmitri E.

AU - Basov, D. N.

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