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Ultrafast Relaxation of Excited Dirac Fermions in Epitaxial Graphene Using Optical Differential Transmission Spectroscopy
Abstract
We investigate the ultrafast relaxation dynamics of hot Dirac fermionic quasiparticles in multilayer epitaxial graphene using ultrafast optical differential transmission spectroscopy. We observe differential transmission spectra which are well described by interband transitions with no electron-hole interaction. Following the initial thermalization and emission of high-energy phonons, the electron cooling is determined by electron-acoustic phonon scattering, found to occur on the time scale of 1 ps for highly doped layers, and 4-11 ps in undoped layers. The spectra also provide strong evidence for the multilayer structure and doping profile of thermally grown epitaxial graphene on SiC.
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Cites
Two-dimensional gas of massless Dirac fermions in graphene
Novoselov, K. S., Geim, A. K., Morozov, S. V., Jiang, D., Katsnelson, M. I., Grigorieva, I. V., Dubonos, S. V., & Firsov, A. A. (2005) · Nature · doi:10.1038/nature04233 · Cited by 21,611
Experimental observation of the quantum Hall effect and Berry's phase in graphene
Zhang, Y., Tan, Y.-W., Stormer, H. L., & Kim, P. (2005) · Nature · doi:10.1038/nature04235 · Cited by 13,435
Berger, C., Song, Z., Li, T., Li, X., Ogbazghi, A. Y., Feng, R., Dai, Z., Marchenkov, A. N., Conrad, E. H., First, P. N., et al. (2004) · The Journal of Physical Chemistry B · doi:10.1021/jp040650f · Cited by 3,548
Self-citationLandau Level Spectroscopy of Ultrathin Graphite Layers
Sadowski, M. L., Martinez, G., Potemski, M., Berger, C., & de Heer, W. A. (2006) · Physical Review Letters · doi:10.1103/physrevlett.97.266405 · Cited by 593
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Cited by
Hot Carrier–Assisted Intrinsic Photoresponse in Graphene
Gabor, N. M., Song, J. C. W., Ma, Q., Nair, N. L., Taychatanapat, T., Watanabe, K., Taniguchi, T., Levitov, L. S., & Jarillo-Herrero, P. (2011) · Science · doi:10.1126/science.1211384 · Cited by 1,076
A Review of the Terahertz Conductivity of Bulk and Nano-Materials
Lloyd-Hughes, J., & Jeon, T.-I. (2012) · Journal of Infrared, Millimeter, and Terahertz Waves · doi:10.1007/s10762-012-9905-y · Cited by 503
de Heer, W. A., Berger, C., Ruan, M., Sprinkle, M., Li, X., Hu, Y., Zhang, B., Hankinson, J., & Conrad, E. (2011) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.1105113108 · Cited by 470
Self-citationUltrafast hot-carrier-dominated photocurrent in graphene
Sun, D., Aivazian, G., Jones, A. M., Ross, J. S., Yao, W., Cobden, D., & Xu, X. (2012) · Nature Nanotechnology · doi:10.1038/nnano.2011.243 · Cited by 462
Self-citationSemimetals for high-performance photodetection
Liu, J., Xia, F., Xiao, D., García de Abajo, F. J., & Sun, D. (2020) · Nature Materials · doi:10.1038/s41563-020-0715-7 · Cited by 326
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Metadata
- Authors
- Sun, D., Wu, Z.-K., Divin, C., Li, X., Berger, C., de Heer, W. A., First, P. N., & Norris, T. B.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2008-10-06
- Volume
- 101
- Issue
- 15
- Pages
- 157402-157402
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W1997227661
- Cited by
- 484
- References
- 4
- FWCI
- 20.04
- Type
- journal article
- Language
- en
- Open access
- closed
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- Sun, D., Wu, Z.-K., Divin, C., Li, X., Berger, C., de Heer, W. A., First, P. N., & Norris, T. B. (2008). Ultrafast Relaxation of Excited Dirac Fermions in Epitaxial Graphene Using Optical Differential Transmission Spectroscopy. Physical Review Letters. https://doi.org/10.1103/physrevlett.101.157402
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