DOI: 10.1063/1.2837539. Measurement of ultrafast carrier dynamics in epitaxial graphene

Measurement of ultrafast carrier dynamics in epitaxial graphene

10.1063/1.2837539

Crossref journal-article

AIP Publishing

Applied Physics Letters (317)

Abstract

Using ultrafast optical pump-probe spectroscopy, we have measured carrier relaxation times in epitaxial graphene layers grown on SiC wafers. We find two distinct time scales associated with the relaxation of nonequilibrium photogenerated carriers. An initial fast relaxation transient in the 70–120fs range is followed by a slower relaxation process in the 0.4–1.7ps range. The slower relaxation time is found to be inversely proportional to the degree of crystalline disorder in the graphene layers as measured by Raman spectroscopy. We relate the measured fast and slow time constants to carrier-carrier and carrier-phonon intraband and interband scattering processes in graphene.

Bibliography

Dawlaty, J. M., Shivaraman, S., Chandrashekhar, M., Rana, F., & Spencer, M. G. (2008). Measurement of ultrafast carrier dynamics in epitaxial graphene. Applied Physics Letters, 92(4).

Authors 5

Jahan M. Dawlaty (first)
Shriram Shivaraman (additional)
Mvs Chandrashekhar (additional)
Farhan Rana (additional)
Michael G. Spencer (additional)

References 20 Referenced 679

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Also available at e-print arXiv:cond-mat/0710.3556.
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Dates

Type	When
Created	17 years, 7 months ago (Jan. 30, 2008, 6:25 p.m.)
Deposited	2 years, 2 months ago (July 2, 2023, 1:45 p.m.)
Indexed	1 week, 4 days ago (Aug. 23, 2025, 1:03 a.m.)
Issued	17 years, 7 months ago (Jan. 28, 2008)
Published	17 years, 7 months ago (Jan. 28, 2008)
Published Online	17 years, 7 months ago (Jan. 30, 2008)
Published Print	17 years, 7 months ago (Jan. 28, 2008)

Funders 0

None

BibTeX

@article{Dawlaty_2008, title={Measurement of ultrafast carrier dynamics in epitaxial graphene}, volume={92}, ISSN={1077-3118}, url={http://dx.doi.org/10.1063/1.2837539}, DOI={10.1063/1.2837539}, number={4}, journal={Applied Physics Letters}, publisher={AIP Publishing}, author={Dawlaty, Jahan M. and Shivaraman, Shriram and Chandrashekhar, Mvs and Rana, Farhan and Spencer, Michael G.}, year={2008}, month=jan }

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