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Energy levels in self-assembled quantum arbitrarily shaped dots
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10.1063/1.1844395
/content/aip/journal/jcp/122/6/10.1063/1.1844395
http://aip.metastore.ingenta.com/content/aip/journal/jcp/122/6/10.1063/1.1844395

Figures

Image of FIG. 1.
FIG. 1.

Model to obtain the states of QD of dimensionality , volume , inside a barrier material . The volume , of the dimensionality and limited by the surface , contains the barrier and QD material . On this surface is applied to the hard boundary conditions (HBC).

Image of FIG. 2.
FIG. 2.

Variation in the energy for the first four electronic states (symmetry , , , and in increasing order of energy) of the rectangular pyramid of base dimensions and in height with the basis set size (see text). The legend box indicates the symmetry of the states.

Image of FIG. 3.
FIG. 3.

Energy (eV) variation of the electronic ground states with the height (Å) for pyramidal QD with (a) square basis of side 60, 80, 120, and and (b) rectangular basis of side , , , and .

Image of FIG. 4.
FIG. 4.

Energy (eV) variation of the hole ground states with the height (Å) for pyramidal QD with square basis of side 60, 80, 120, and and parametrizations and (see text).

Image of FIG. 5.
FIG. 5.

Energy (eV) variation of the ground a four firstly electronic (, , , , and ) and hole (parametrization ) states (, , , , and ) with the height (Å) for pyramidal QD with a square base of side .

Image of FIG. 6.
FIG. 6.

Variation in the energy for the electronic ground state of cylindrical QD with respect to radius (height constant equal to ) and height (radius constant equal to ).  represents the radius or the height, respectively.

Image of FIG. 7.
FIG. 7.

Difference between the electronic ground state energy of the cylindrical QD of Ref. 25 and the method presented here.  is the quotient between the radius and the lattice parameter of the HgS . The cylindrical QD has the height equal to the radius.

Image of FIG. 8.
FIG. 8.

Energy difference between the cylindrical and tetrahedral electronic ground state with respect to the energy of the pyramidal electronic ground state with equal volume. For this comparison a squared pyramid with sides of 120 and has been chosen. The curves corresponding to the energy ground state difference between sphere and pyramid, and curves by the tetrahedral and pyramid.

Image of FIG. 9.
FIG. 9.

Energy difference between the electronic ground and first excited states (, , , , and ) for QD of pyramidal shape with square basis of side , with and without truncation.

Image of FIG. 10.
FIG. 10.

Energy difference between experimental values of Ref. 27 by pyramidal QD and this model for transitions between electron and hole excited states with .

Tables

Generic image for table
Table I.

Comparison between the results obtained with this model for pyramidal QD transitions and experimental values from PL spectra in Ref. 26.

Generic image for table
Table II.

Comparison between the results obtained with this model for the PL transitions of Refs. 18 and 19 for pyramidal QD.

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/content/aip/journal/jcp/122/6/10.1063/1.1844395
2005-01-25
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Energy levels in self-assembled quantum arbitrarily shaped dots
http://aip.metastore.ingenta.com/content/aip/journal/jcp/122/6/10.1063/1.1844395
10.1063/1.1844395
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