Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/47444
Registo completo
Campo DC | Valor | Idioma |
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dc.contributor.author | Ventura, G. B. | por |
dc.contributor.author | Passos, D. J. | por |
dc.contributor.author | Santos, J. M. B. Lopes dos | por |
dc.contributor.author | Lopes, J. M. Viana Parente | por |
dc.contributor.author | Peres, N. M. R. | por |
dc.date.accessioned | 2017-11-16T11:16:48Z | - |
dc.date.available | 2017-11-16T11:16:48Z | - |
dc.date.issued | 2017-03-22 | - |
dc.identifier.issn | 2469-9950 | por |
dc.identifier.uri | https://hdl.handle.net/1822/47444 | - |
dc.description.abstract | The formalism of the reduced density matrix is pursued in both length and velocity gauges of the perturbation to the crystal Hamiltonian. The covariant derivative is introduced as a convenient representation of the position operator. This allow us to write compact expressions for the reduced density matrix in any order of the perturbation which simplifies the calculations of nonlinear optical responses; as an example, we compute the first and third order contributions of the monolayer graphene. Expressions obtained in both gauges share the same formal structure, allowing a comparison of the effects of truncation to a finite set of bands. This truncation breaks the equivalence between the two approaches: its proper implementation can be done directly in the expressions derived in the length gauge, but require a revision of the equations of motion of the reduced density matrix in the velocity gauge. | por |
dc.description.sponsorship | The work of G.B.V. and D.J.P. is supported by Fundação para a Ciência e Tecnologia (FCT) under the Grants No. PD/BI/129220/2017 and No. PD/BD/135019/2017, respectively. N.M.R.P. acknowledges funding from the European Commission within the project "Graphene-Driven Revolutions in ICT and Beyond" (Ref. No. 696656) and the Portuguese Foundation for Science and Technology (FCT) in the framework of the Strategic Financing Grant No. UID/FIS/04650/2013. | por |
dc.language.iso | eng | por |
dc.publisher | American Physical Society | por |
dc.relation | PD/BI/129220/2017 | por |
dc.relation | PD/BD/135019/2017 | por |
dc.relation | info:eu-repo/grantAgreement/EC/H2020/696656/EU | por |
dc.relation | info:eu-repo/grantAgreement/FCT/5876/147414/PT | por |
dc.rights | openAccess | por |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-sa/4.0/ | por |
dc.subject | Nonlinear Optics | por |
dc.subject | Graphene | por |
dc.title | Gauge covariances and nonlinear optical responses | por |
dc.type | article | por |
dc.peerreviewed | yes | por |
oaire.citationIssue | 3 | por |
oaire.citationVolume | 96 | por |
dc.identifier.doi | 10.1103/PhysRevB.96.035431 | por |
dc.subject.fos | Ciências Naturais::Ciências Físicas | por |
dc.description.publicationversion | info:eu-repo/semantics/publishedVersion | por |
dc.subject.wos | Science & Technology | por |
sdum.journal | Physical Review B | por |
Aparece nas coleções: | CDF - CEP - Artigos/Papers (with refereeing) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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1703.07796.pdf | 237,37 kB | Adobe PDF | Ver/Abrir |
Este trabalho está licenciado sob uma Licença Creative Commons