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

doi:10.1021/acs.nanolett.6b04313

Faraday Rotation Due to Surface States in the Topological Insulator (Bi_1-xSb_x)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

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22 Scopus citations

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 language	English (US)
Pages (from-to)	980-984
Number of pages	5
Journal	Nano letters
Volume	17
Issue number	2
DOIs	https://doi.org/10.1021/acs.nanolett.6b04313
State	Published - Feb 8 2017

All Science Journal Classification (ASJC) codes

Bioengineering
General Chemistry
General Materials Science
Condensed Matter Physics
Mechanical Engineering

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10.1021/acs.nanolett.6b04313

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

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.",

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

note = "Publisher Copyright: {\textcopyright} 2016 American Chemical Society.",

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doi = "10.1021/acs.nanolett.6b04313",

language = "English (US)",

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T1 - Faraday Rotation Due to Surface States in the Topological Insulator (Bi1-xSbx)2Te3

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.

PY - 2017/2/8

Y1 - 2017/2/8

N2 - 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.

AB - 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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Faraday Rotation Due to Surface States in the Topological Insulator (Bi_1-xSb_x)₂Te₃

Abstract

All Science Journal Classification (ASJC) codes

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