Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/24611
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Campo DC | Valor | Idioma |
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dc.contributor.author | Malard, Leandro M. | - |
dc.contributor.author | Mak, Kin Fai | - |
dc.contributor.author | Castro Neto, A. H. | - |
dc.contributor.author | Peres, N. M. R. | - |
dc.contributor.author | Heinz, Tony F. | - |
dc.date.accessioned | 2013-07-09T17:24:55Z | - |
dc.date.available | 2013-07-09T17:24:55Z | - |
dc.date.issued | 2013 | - |
dc.identifier.citation | New Journal of Physics | por |
dc.identifier.issn | 1367-2630 | por |
dc.identifier.uri | https://hdl.handle.net/1822/24611 | - |
dc.description.abstract | The optical conductivity of freely suspended graphene was examined under non-equilibrium conditions using femtosecond pump-probe spectroscopy. We observed a conductivity transient that varied strongly with the electronic temperature, exhibiting a crossover from enhanced to decreased absorbance with increasing pump fluence. The response arises from a combination of bleaching of the inter-band transitions by Pauli blocking and induced absorption from the intra-band transitions of the carriers. The latter dominates at low electronic temperature, but, despite an increase in Drude scattering rate, is overwhelmed by the former at high electronic temperature. The time-evolution of the optical conductivity in all regimes can described in terms of a time-varying electronic temperature. | por |
dc.description.sponsorship | We thank Dr Y Wu, Dr M Koshino, Dr D Song, and Dr H Yan for fruitful discussions and C H Lui for sample preparation. We acknowledge support from the MURI program of the Air Force Office of Scientific Research (Arlington, VA, USA) and from the National Science Foundation under grant numbers DMR-1124894 and DMR-1106225. AHCN acknowledges partial support from the US DOE under grant no. DE-FG02-08ER46512 and from the Office of Naval Research (ONR) under MURI grant no. N00014-09-1-1063. LM acknowledges support from the Conselho Nacional de Pesquisa (CNPq) program in Brazil. | por |
dc.language.iso | eng | por |
dc.publisher | IOP Publishing Ltd | por |
dc.rights | openAccess | por |
dc.subject | Graphene | por |
dc.subject | Optical | por |
dc.title | Observation of intra- and inter-band transitions in the optical response of graphene | por |
dc.type | article | por |
dc.peerreviewed | yes | por |
dc.relation.publisherversion | http://iopscience.iop.org/1367-2630/15/1/015009/pdf/1367-2630_15_1_015009.pdf | por |
sdum.publicationstatus | published | por |
oaire.citationStartPage | 015009 | por |
oaire.citationTitle | New Journal of Physics | por |
oaire.citationVolume | 15 | por |
dc.identifier.doi | 10.1088/1367-2630/15/1/015009 | por |
dc.subject.wos | Science & Technology | por |
sdum.journal | New Journal of Physics | por |
Aparece nas coleções: | CDF - CEP - Artigos/Papers (with refereeing) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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1104.3104v1_NJP.pdf | 4,74 MB | Adobe PDF | Ver/Abrir |