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Electron correlations in quantum ring and dot systems

✍ Scribed by P. Pietiläinen; V. Halonen; Tapash Chakraborty

Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
318 KB
Volume
212
Category
Article
ISSN
0921-4526

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✦ Synopsis

A model for a quantum ring in magnetic fields is introduced where various electronic properties viz., the single-and many-electron energy spectrum, magnetization (persistent current) and the dipole-allowed absorption energies can be studied very accurately. The impurity potential lifts the degeneracies in the energy spectrum and the persistent current is then reduced from the impurity-free value. The effect of the Coulomb interaction on the persistent current is, however, insignificant. The dipole-allowed absorption energies in a quantum ring are presented. Similar studies for a quantum dot with a Gaussian impurity in the middle reveal quite rich structures in the absorption spectrum.

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