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- Title
DIMENSIONAL TRANSITIONS OF DENSITY OF STATES AND HEAT CAPACITY IN SPHERICAL QUANTUM DOTS.
- Authors
LEE, SEUNG JOO; JEON, HEE CHANG; KANG, TAE WON; SOUMA, SATOFUMI
- Abstract
We evaluate analytically and numerically the density of states (DOS) and the heat capacity in a spherical quantum dot formed by a spherical thin barrier. The control of the spherical barrier thickness or the potential barrier height is found to cause the dimensional transition from the three-dimensional (3D) behavior to the quasi-zero dimensional (Q0D) behavior in the DOS and the heat capacity. When the barrier is thick enough, the DOS shows the Q0D-like behavior but when the barrier is thin enough to allow electrons to tunnel through it, the temperature dependence of the heat capacity exhibits quite a distinct behavior depending on the electron density. Explicit numerical plots are given in the low density regime.
- Subjects
NUMERICAL analysis; DENSITY; ELECTRON distribution; THERMAL properties of semiconductors; QUANTUM dots
- Publication
International Journal of Modern Physics B: Condensed Matter Physics; Statistical Physics; Applied Physics, 2008, Vol 22, Issue 15, p2373
- ISSN
0217-9792
- Publication type
Article
- DOI
10.1142/S0217979208039654