Tuning of energy levels and optical properties of graphene quantum dots
Data(s) |
2008
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Resumo |
We investigate theoretically the magnetic levels and optical properties of zigzag- and armchair-edged hexagonal graphene quantum dots (GQDs) utilizing the tight-binding method. A bound edge state at zero energy appears for the zigzag GQDs in the absence of a magnetic field. The magnetic levels of GQDs exhibit a Hofstadter-butterfly spectrum and approach the Landau levels of two-dimensional graphene as the magnetic field increases. The optical properties are tuned by the size, the type of the edge, and the external magnetic field. |
Identificador | |
Idioma(s) |
英语 |
Fonte |
Zhang, ZZ ; Chang, K .Tuning of energy levels and optical properties of graphene quantum dots ,PHYSICAL REVIEW B,2008 ,77(23): Art. No. 235411 |
Palavras-Chave | #半导体物理 #BLOCH ELECTRONS |
Tipo |
期刊论文 |