Nonlinear optical responses of crystalline systems: Results from a velocity gauge analysis

• Tipo: Artigo em Revista Científica Internacional
• Data: 2018

Autores

Passos, DJ (Autor) Outra; Ventura, GB (Autor) Outra; Viana Parente Lopes, JMVP (Autor) FCUP; Lopes dos Santos, JMBL (Autor) FCUP; Peres, NMR (Autor) Outra

Revista

Título: Physical Review B

Vol. 97

ISSN: 2469-9950

Editora: American Physical Society

Indexação

ISI Web of Knowledge - 48 Citações

Scopus - 51 Citações

Outras Informações

ID Authenticus: P-00Q-57Y

DOI: 10.1103/physrevb.97.235446

Abstract (EN): In this work, the difficulties inherent to perturbative calculations in the velocity gauge are addressed. In particular, it is shown how calculations of nonlinear optical responses in the independent particle approximation can be done to any order and for any finite band model. The procedure and advantages of the velocity gauge in such calculations are described. The addition of a phenomenological relaxation parameter is also discussed. As an illustration, the nonlinear optical response of monolayer graphene is numerically calculated using the velocity gauge.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 11