Publication Type |
Journal Article |
School or College |
College of Science |
Department |
Physics |
Creator |
Vardeny, Zeev Valentine |
Other Author |
Luer, Larry; Lanzani, Guglielmo; Crochet, Jared; Hertel, Tobias; Holt, Josh |
Title |
Ultrafast dynamics in metallic and semiconducting carbon nanotubes |
Date |
2009-11 |
Description |
Transient polarized pump/probe transmission changes upon pulse photoexcitation at 1.6 eV were measured in chiral enriched carbon nanotubes ensembles of both metallic and semiconductor characters, in a very broad probe spectral range from mid-IR to visible, combining several ultrafast laser systems. We identify a photoinduced absorption band at ~0.7 eV as due to hot Dirac fermions in the metallic tubes and measure its dynamics. The hot carriers equilibrate within the electronic system in ~400 fs and with the lattice within ~2 ps; in agreement with hot Dirac fermions thermalization in graphene. We also assign excitonic transitions in the semiconducting tubes, mainly of (6,5) chirality; in particular, an intraexciton transition at ~0.4 eV represents a lower limit for the exciton binding energy. |
Type |
Text |
Publisher |
American Physical Society |
Journal Title |
Physical Review B |
Volume |
80 |
Issue |
20 |
First Page |
205411 |
Last Page |
205411 |
DOI |
10.1103/PhysRevB.80.205411 |
citatation_issn |
1098-0121 |
Language |
eng |
Bibliographic Citation |
Luer, L., Lanzani, G., Crochet, J., Hertel, T., Holt, J., & Vardeny, Z. V. (2009). Ultrafast dynamics in metallic and semiconducting carbon nanotubes. Physical Review B, 80(2), 205411-1-5. |
Rights Management |
(c) American Physical Society http://dx.doi.org/DOI: 10.1103/PhysRevB.80.205411. |
Format Medium |
application/pdf |
Format Extent |
198,588 bytes |
Identifier |
ir-main,10131 |
ARK |
ark:/87278/s68k7tqv |
Setname |
ir_uspace |
ID |
706831 |
Reference URL |
https://collections.lib.utah.edu/ark:/87278/s68k7tqv |