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Measurement of Intrinsic Dirac Fermion Cooling on the Surface of the Topological InsulatorBi2Se3Using Time-Resolved and Angle-Resolved Photoemission Spectroscopy
Open accessAbstract
We perform time- and angle-resolved photoemission spectroscopy of a prototypical topological insulator (TI) Bi(2)Se(3) to study the ultrafast dynamics of surface and bulk electrons after photoexcitation. By analyzing the evolution of surface states and bulk band spectra, we obtain their electronic temperature and chemical potential relaxation dynamics separately. These dynamics reveal strong phonon-assisted surface-bulk coupling at high lattice temperature and total suppression of inelastic scattering between the surface and the bulk at low lattice temperature. In this low temperature regime, the unique cooling of Dirac fermions in TI by acoustic phonons is manifested through a power law dependence of the surface temperature decay rate on carrier density.
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Cited by
Shift charge and spin photocurrents in Dirac surface states of topological insulator
Kim, K. W., Morimoto, T., & Nagaosa, N. (2017) · Physical Review B · doi:10.1103/physrevb.95.035134 · Cited by 79
Metadata
- Authors
- Wang, Y. H., Hsieh, D., Sie, E. J., Steinberg, H., Gardner, D. R., Lee, Y. S., Jarillo-Herrero, P., & Gedik, N.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2012-09-20
- Volume
- 109
- Issue
- 12
- Pages
- 127401-127401
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W1541064405
- Cited by
- 269
- References
- 49
- FWCI
- 11.13
- Type
- journal article
- Language
- en
- Open access
- green
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- Wang, Y. H., Hsieh, D., Sie, E. J., Steinberg, H., Gardner, D. R., Lee, Y. S., Jarillo-Herrero, P., & Gedik, N. (2012). Measurement of Intrinsic Dirac Fermion Cooling on the Surface of the Topological InsulatorBi2Se3Using Time-Resolved and Angle-Resolved Photoemission Spectroscopy. Physical Review Letters. https://doi.org/10.1103/physrevlett.109.127401
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