Graphene quantum dot with a hydrogenic impurity

Autor:	Neslihan Gökçek, B. S. Kandemir
Rok vydání:	2016
Předmět:	Physics History Condensed matter physics Radius Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Critical value Graphene quantum dot Computer Science Applications Education Magnetic field Impurity Wave function Anderson impurity model Magnetic impurity
Zdroj:	Journal of Physics: Conference Series. 707:012008
ISSN:	1742-6596 1742-6588
DOI:	10.1088/1742-6596/707/1/012008
Popis:	We investigate the electronic energy levels of a circular graphene quantum dot with a hydrogenic impurity placed at the center of the dot. We have adopted a variational scheme in such a way that the trial wave functions take into account the carrier confinement due to the dot geometry as well as the effect of the magnetic field. We found that the presence of impurity strongly modifies the electronic spectrum of the graphene quantum dot. We also calculated the critical value of the impurity strength as a function of dot radius.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::fe8eadc238ab39b6a2670d5bc37d8b89 https://doi.org/10.1088/1742-6596/707/1/012008 Zobrazit plný text záznamu