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

• Type: Article in International Scientific Journal
• Date: 2018

Authors

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

Journal

Title: Physical Review B

Vol. 97

ISSN: 2469-9950

Publisher: American Physical Society

Indexing

ISI Web of Knowledge - 48 Citations

Scopus - 51 Citations

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 11