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Optical characterization ofBi2Se3in a magnetic field: Infrared evidence for magnetoelectric coupling in a topological insulator material
Open accessAbstract
We present an infrared magneto-optical study of the highly thermoelectric narrow-gap semiconductor ${\text{Bi}}_{2}{\text{Se}}_{3}$. Far-infrared and midinfrared (IR) reflectance and transmission measurements have been performed in magnetic fields oriented both parallel and perpendicular to the trigonal $c$ axis of this layered material and supplemented with UV-visible ellipsometry to obtain the optical conductivity ${\ensuremath{\sigma}}_{1}(\ensuremath{\omega})$. With lowering of temperature we observe narrowing of the Drude conductivity due to reduced quasiparticle scattering, as well as an increase in the absorption edge due to direct electronic transitions. Magnetic fields $H\ensuremath{\parallel}c$ dramatically renormalize and asymmetrically broaden the strongest far-IR optical phonon, indicating interaction of the phonon with the continuum free-carrier spectrum and significant magnetoelectric coupling. For the perpendicular field orientation, electronic absorption is enhanced, and the plasma edge is slightly shifted to higher energies. In both cases the direct transition energy is softened in magnetic field.
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Cites
Topological insulators in Bi2Se3, Bi2Te3 and Sb2Te3 with a single Dirac cone on the surface
Zhang, H., Liu, C.-X., Qi, X.-L., Dai, X., Fang, Z., & Zhang, S.-C. (2009) · Nature Physics · doi:10.1038/nphys1270 · Cited by 6,359
Superconducting Proximity Effect and Majorana Fermions at the Surface of a Topological Insulator
Fu, L., & Kane, C. L. (2008) · Physical Review Letters · doi:10.1103/physrevlett.100.096407 · Cited by 4,868
Observation of a large-gap topological-insulator class with a single Dirac cone on the surface
Xia, Y., Qian, D., Hsieh, D., Wray, L., Pal, A., Lin, H., Bansil, A., Grauer, D., Hor, Y. S., Cava, R. J., et al. (2009) · Nature Physics · doi:10.1038/nphys1274 · Cited by 3,765
A topological Dirac insulator in a quantum spin Hall phase
Hsieh, D., Qian, D., Wray, L., Xia, Y., Hor, Y. S., Cava, R. J., & Hasan, M. Z. (2008) · Nature · doi:10.1038/nature06843 · Cited by 3,523
Topological field theory of time-reversal invariant insulators
Qi, X.-L., Hughes, T. L., & Zhang, S.-C. (2008) · Physical Review B · doi:10.1103/physrevb.78.195424 · Cited by 3,329
A tunable topological insulator in the spin helical Dirac transport regime
Hsieh, D., Xia, Y., Qian, D., Wray, L., Dil, J. H., Meier, F., Osterwalder, J., Patthey, L., Checkelsky, J. G., Ong, N. P., et al. (2009) · Nature · doi:10.1038/nature08234 · Cited by 1,979
Magnetoelectric Polarizability and Axion Electrodynamics in Crystalline Insulators
Essin, A. M., Moore, J. E., & Vanderbilt, D. (2009) · Physical Review Letters · doi:10.1103/physrevlett.102.146805 · Cited by 947
p -type Bi 2 Se 3 for topological insulator and low-temperature thermoelectric applications
Hor, Y. S., Richardella, A., Roushan, P., Xia, Y., Checkelsky, J. G., Yazdani, A., Hasan, M. Z., Ong, N. P., & Cava, R. J. (2009) · Physical Review B · doi:10.1103/physrevb.79.195208 · Cited by 647
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Topological insulators and superconductors
Qi, X.-L., & Zhang, S.-C. (2011) · Reviews of Modern Physics · doi:10.1103/revmodphys.83.1057 · Cited by 14,394
Raman Spectroscopy of Few-Quintuple Layer Topological Insulator Bi2Se3 Nanoplatelets
Zhang, J., Peng, Z., Soni, A., Zhao, Y., Xiong, Y., Peng, B., Wang, J., Dresselhaus, M. S., & Xiong, Q. (2011) · Nano Letters · doi:10.1021/nl200773n · Cited by 511
Topological insulator nanostructures for near-infrared transparent flexible electrodes
Peng, H., Dang, W., Cao, J., Chen, Y., Wu, D., Zheng, W., Li, H., Shen, Z.-X., & Liu, Z. (2012) · Nature Chemistry · doi:10.1038/nchem.1277 · Cited by 344
Topological Quantization in Units of the Fine Structure Constant
Maciejko, J., Qi, X.-L., Drew, H. D., & Zhang, S.-C. (2010) · Physical Review Letters · doi:10.1103/physrevlett.105.166803 · Cited by 254
Tanner, D. B. (2019) · doi:10.1017/9781316672778 · Cited by 106
Metadata
- Authors
- LaForge, A. D., Frenzel, A., Pursley, B. C., Lin, T., Liu, X., Shi, J., & Basov, D. N.
- Venue
- Physical Review B
- Publisher
- American Physical Society (APS)
- Published
- 2010-03-23
- Volume
- 81
- Issue
- 12
- ISSN
- 1098-0121 (ISSN-L)
- 1550-235X
- OpenAlex
- W2077131009
- Cited by
- 234
- References
- 8
- FWCI
- 10.69
- Type
- journal article
- Language
- en
- Open access
- green
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- LaForge, A. D., Frenzel, A., Pursley, B. C., Lin, T., Liu, X., Shi, J., & Basov, D. N. (2010). Optical characterization ofBi2Se3in a magnetic field: Infrared evidence for magnetoelectric coupling in a topological insulator material. Physical Review B. https://doi.org/10.1103/physrevb.81.125120
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