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Direct View of Hot Carrier Dynamics in Graphene
Open accessAbstract
The ultrafast dynamics of excited carriers in graphene is closely linked to the Dirac spectrum and plays a central role for many electronic and optoelectronic applications. Harvesting energy from excited electron-hole pairs, for instance, is only possible if these pairs can be separated before they lose energy to vibrations, merely heating the lattice. Until now, the hot carrier dynamics in graphene could only be accessed indirectly. Here, we present a dynamical view on the Dirac cone by time- and angle-resolved photoemission spectroscopy. This allows us to show the quasi-instant thermalization of the electron gas to a temperature of ≈2000 K, to determine the time-resolved carrier density, and to disentangle the subsequent decay into excitations of optical phonons and acoustic phonons (directly and via supercollisions).
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Cites
The electronic properties of graphene
Castro Neto, A. H., Guinea, F., Peres, N. M. R., Novoselov, K. S., & Geim, A. K. (2009) · Reviews of Modern Physics · doi:10.1103/revmodphys.81.109 · Cited by 24,803
Cited by
Photodetectors based on graphene, other two-dimensional materials and hybrid systems
Koppens, F. H. L., Mueller, T., Avouris, P., Ferrari, A. C., Vitiello, M. S., & Polini, M. (2014) · Nature Nanotechnology · doi:10.1038/nnano.2014.215 · Cited by 3,828
Multifunctional Energy Storage and Conversion Devices
Huang, Y., Zhu, M., Huang, Y., Pei, Z., Li, H., Wang, Z., Xue, Q., & Zhi, C. (2016) · Advanced Materials · doi:10.1002/adma.201601928 · Cited by 544
Snapshots of non-equilibrium Dirac carrier distributions in graphene
Gierz, I., Petersen, J. C., Mitrano, M., Cacho, C., Turcu, I. C. E., Springate, E., Stöhr, A., Köhler, A., Starke, U., & Cavalleri, A. (2013) · Nature Materials · doi:10.1038/nmat3757 · Cited by 485
Self-citationHydrodynamics of electrons in graphene
Lucas, A., & Fong, K. C. (2018) · Journal of Physics: Condensed Matter · doi:10.1088/1361-648x/aaa274 · Cited by 382
Sentef, M. A., Claassen, M., Kemper, A. F., Moritz, B., Oka, T., Freericks, J. K., & Devereaux, T. P. (2015) · Nature Communications · doi:10.1038/ncomms8047 · Cited by 284
Metadata
- Authors
- Johannsen, J. C., Ulstrup, S., Cilento, F., Crepaldi, A., Zacchigna, M., Cacho, C., Turcu, I. C. E., Springate, E., Fromm, F., Raidel, C., Seyller, T., Parmigiani, F., Grioni, M., & Hofmann, P.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2013-07-09
- Volume
- 111
- Issue
- 2
- Pages
- 027403-027403
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W1962814503
- Cited by
- 404
- References
- 1
- FWCI
- 17.32
- Type
- journal article
- Language
- en
- Open access
- green
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- Johannsen, J. C., Ulstrup, S., Cilento, F., Crepaldi, A., Zacchigna, M., Cacho, C., Turcu, I. C. E., Springate, E., Fromm, F., Raidel, C., Seyller, T., Parmigiani, F., Grioni, M., & Hofmann, P. (2013). Direct View of Hot Carrier Dynamics in Graphene. Physical Review Letters. https://doi.org/10.1103/physrevlett.111.027403
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