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Time Evolution of the Electronic Structure of1T−TaS2through the Insulator-Metal Transition
Open accessAbstract
Femtosecond time-resolved photoemission is used to investigate the time evolution of electronic structure in the Mott insulator 1T-TaS2. A collapse of the electronic gap is observed within 100 femtoseconds after optical excitation. The photoemission spectra and the spectral function calculated by dynamical mean field theory show that this insulator-metal transition is driven solely by hot electrons. A coherently excited lattice displacement results in a periodic shift of the spectra lasting for 20 ps without perturbing the insulating phase. This capability to disentangle electronic and phononic excitations opens new directions to study electron correlation in solids.
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Cited by
Nonequilibrium dynamical mean-field theory and its applications
Aoki, H., Tsuji, N., Eckstein, M., Kollar, M., Oka, T., & Werner, P. (2014) · Reviews of Modern Physics · doi:10.1103/revmodphys.86.779 · Cited by 773
1T-TaS 2 as a quantum spin liquid
Law, K. T., & Lee, P. A. (2017) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.1706769114 · Cited by 328
Nicoletti, D., Casandruc, E., Laplace, Y., Khanna, V., Hunt, C. R., Kaiser, S., Dhesi, S. S., Gu, G. D., Hill, J. P., & Cavalleri, A. (2014) · Physical Review B · doi:10.1103/physrevb.90.100503 · Cited by 141
Metadata
- Authors
- Perfetti, L., Loukakos, P. A., Lisowski, M., Bovensiepen, U., Berger, H., Biermann, S., Cornaglia, P. S., Georges, A., & Wolf, M.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2006-08-08
- Volume
- 97
- Issue
- 6
- Pages
- 067402-067402
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2057275814
- Cited by
- 519
- References
- 0
- FWCI
- 9.33
- Type
- journal article
- Language
- en
- Open access
- green
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- Perfetti, L., Loukakos, P. A., Lisowski, M., Bovensiepen, U., Berger, H., Biermann, S., Cornaglia, P. S., Georges, A., & Wolf, M. (2006). Time Evolution of the Electronic Structure of1T−TaS2through the Insulator-Metal Transition. Physical Review Letters. https://doi.org/10.1103/physrevlett.97.067402
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