| Autor: |
Tung, L. -C., Yu, W., Cadden-Zimansky, P., Miotkowski, I., Chen, Y. P., Smirnov, D., Jiang, Z. |
| Rok vydání: |
2015 |
| Předmět: |
|
| Zdroj: |
Phys. Rev. B 93, 085140 (2016) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevB.93.085140 |
| Popis: |
Ultrathin Bi$_{2}$Te$_{3}$ single crystals laid on Scotch tape are investigated by Fourier transform infrared spectroscopy at $4$K and in a magnetic field up to $35$T. The magneto-transmittance spectra of the Bi$_{2}$% Te$_{3}$/tape composite are analyzed as a two-layer system and the optical conductivity of Bi$_{2}$Te$_{3}$ at different magnetic fields are extracted. We find that magnetic field modifies the optical conductivity in the following ways: (1) Field-induced transfer of the optical weight from the lower frequency regime ($<250$cm$^{-1}$) to the higher frequency regime ($% >250$cm$^{-1}$) due to the redistribution of charge carriers across the Fermi surface. (2) Evolving of a Fano-resonance-like spectral feature from an anti-resonance to a resonance with increasing magnetic field. Such behavior can be attributed to the electron-phonon interactions between the $% E_{u}^{1}$ optical phonon mode and the continuum of electronic transitions. (3) Cyclotron resonance resulting from the inter-valence band Landau level transitions, which can be described by the electrodynamics of massive Dirac holes. |
| Databáze: |
arXiv |
| Externí odkaz: |
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