Ultrafast Relaxation Dynamics via Acoustic Phonons in Carbon Nanotubes

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Details zur Publikation

Autor(en): Dyatloya OA, Koehler C, Malic E, Gomis-Bresco J, Maultzsch J, Tsagan-Mandzhiev A, Watermann T, Knorr A, Woggon U
Zeitschrift: Nano Letters
Verlag: AMER CHEMICAL SOC
Jahr der Veröffentlichung: 2012
Band: 12
Heftnummer: 5
Seitenbereich: 2249-2253
ISSN: 1530-6984


Abstract


Carbon nanotubes as one-dimensional nanostructures are ideal model systems to study relaxation channels of excited charged carriers. The understanding of the ultrafast scattering processes is the key for exploiting the huge application potential that nanotubes offer, e.g., for light-emitting and detecting nanoscale electronic devices. In a joint study of two-color pump-probe experiments and microscopic calculations based on the density matrix formalism, we extract, both experimentally and theoretically, a picosecond carrier relaxation dynamics, and ascribe it to the intraband scattering of excited carriers with acoustic phonons. The calculated picosecond relaxation times show a decrease for smaller tube diameters. The best agreement between experiment and theory is obtained for the (8,7) nanotubes with the largest investigated diameter and chiral angle for which the applied zone-folded tight-binding wave functions are a good approximation.



FAU-Autoren / FAU-Herausgeber

Maultzsch, Janina Prof. Dr.
Lehrstuhl für Experimentalphysik


Autor(en) der externen Einrichtung(en)
Autonomous University of Barcelona (UAB) / Universitat Autònoma de Barcelona
Freie Universität Berlin
Technische Universität Berlin


Zitierweisen

APA:
Dyatloya, O.A., Koehler, C., Malic, E., Gomis-Bresco, J., Maultzsch, J., Tsagan-Mandzhiev, A.,... Woggon, U. (2012). Ultrafast Relaxation Dynamics via Acoustic Phonons in Carbon Nanotubes. Nano Letters, 12(5), 2249-2253. https://dx.doi.org/10.1021/nl2043997

MLA:
Dyatloya, Olga A., et al. "Ultrafast Relaxation Dynamics via Acoustic Phonons in Carbon Nanotubes." Nano Letters 12.5 (2012): 2249-2253.

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Zuletzt aktualisiert 2018-08-08 um 03:42