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Electrical linear control of the electronic structure of graphene quantum dots
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10.1063/1.4811519
/content/aip/journal/jap/113/23/10.1063/1.4811519
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/23/10.1063/1.4811519
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Two non-uniform electric fields applied to a triangular zigzag graphene quantum dot ( ). (a) Two gates with electrostatic potentials are applied inside and outside the quantum dot. The width of the gate electrode with the negative voltage can be considered as zero. (b) The contour of the electrostatic potential by the electric field shown in (a). (c) Two gates with electrostatic potentials are applied to the left and right of the quantum dot. (d) The contour of the electrostatic potential by the electric field shown in (c). (e) The graphene quantum dot is labelled with the number of the site .

Image of FIG. 2.
FIG. 2.

The low-energy spectra of the quantum dots subjected to the non-uniform electric field as shown in Fig. 1(a) . (a) , (b) , and (c) .

Image of FIG. 3.
FIG. 3.

The density of the eigenstates of the graphene quantum dot ( ). (a) and (b) correspond, respectively, to the top branch and the central branch of the zero-energy splitting with in Fig. 2 ; (c)–(e) correspond, respectively, to the top branch, the central branch, and the bottom branch of the zero-energy splitting with in Fig. 5 . The value of the corresponding site is indicated in the top of each peak.

Image of FIG. 4.
FIG. 4.

The density plot of the eigenstates of the graphene quantum dot ( ). (a)–(e) correspond, respectively, to Fig. 3(a) 3(e) . Here, the size of each shaded circle is roughly proportional to the corresponding density.

Image of FIG. 5.
FIG. 5.

The low-energy spectra of the graphene quantum dots subjected to the non-uniform electric field as shown in Fig. 1(c) . (a) , (b) , and (c) .

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/content/aip/journal/jap/113/23/10.1063/1.4811519
2013-06-18
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Electrical linear control of the electronic structure of graphene quantum dots
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/23/10.1063/1.4811519
10.1063/1.4811519
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