Screening in Graphene: Response to External Static Electric Field and an Image-Potential Problem

Autor:	Vyacheslav M. Silkin, Eugene Kogan, Godfrey Gumbs
Jazyk:	angličtina
Rok vydání:	2021
Předmět:	graphene electric field valence charge density image potential image-plane position image-potential states Chemistry QD1-999
Zdroj:	Nanomaterials, Vol 11, Iss 6, p 1561 (2021)
Druh dokumentu:	article
ISSN:	11061561 2079-4991 68794851
DOI:	10.3390/nano11061561
Popis:	We present a detailed first-principles investigation of the response of a free-standing graphene sheet to an external perpendicular static electric field E. The charge density distribution in the vicinity of the graphene monolayer that is caused by E was determined using the pseudopotential density-functional theory approach. Different geometries were considered. The centroid of this extra density induced by an external electric field was determined as zim = 1.048 Å at vanishing E, and its dependence on E has been obtained. The thus determined zim was employed to construct the hybrid one-electron potential which generates a new set of energies for the image-potential states.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/e687948516824063875b8d3cbb44926c Zobrazit plný text záznamu View record in DOAJ