Magneto-Infrared Study of Topological Insulator Bi2Se3

W. Yu; X. Chen; Z. Jiang; I. Miotkowski; H. Cao; Y. P. Chen; D. Smirnov; L. -C. Tung

Magneto-Infrared Study of Topological Insulator Bi2Se3

Materials Science 2015-08-20 v2

Authors: W. Yu , X. Chen , Z. Jiang , I. Miotkowski , H. Cao , Y. P. Chen , D. Smirnov , L. -C. Tung

Abstract

We present a magneto-infrared spectroscopic study of thin Bi2Se3 single crystal flakes. Magneto-infrared transmittance and reflectance measurements are performed in the Faraday geometry at 4.2K in a magnetic field up to 17.5T. Thin Bi2Se3 flakes (much less than 1{\mu}m thick) are stabilized on the Scotch tape, and the reduced thickness enables us to obtain appreciable far-infrared transmission through the highly reflective Bi2Se3 single crystals. A pronounced electron-phonon coupling is manifested as a Fano resonance at the {\alpha} optical phonon mode in Bi2Se3, resulting from the quantum interference between the optical phonon mode and the continuum of the electronic states. However, the Fano resonance exhibits no systematic line broadening, in contrast to the earlier observation of a similar Fano resonance in Bi2Se3 using magneto-infrared reflectance spectroscopy.

Keywords

topological insulator Bi2Se3 magneto-infrared spectroscopy Fano resonance electron-phonon coupling optical phonon Faraday geometry

Cite

@article{arxiv.1508.04363,
  title  = {Magneto-Infrared Study of Topological Insulator Bi2Se3},
  author = {W. Yu and X. Chen and Z. Jiang and I. Miotkowski and H. Cao and Y. P. Chen and D. Smirnov and L. -C. Tung},
  journal= {arXiv preprint arXiv:1508.04363},
  year   = {2015}
}

Magneto-Infrared Study of Topological Insulator Bi2Se3

Abstract

Keywords

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