Physics – Condensed Matter
Scientific paper
1996-06-21
Physics
Condensed Matter
12 pages, 9 Postscript figures, uses jpsj.sty
Scientific paper
10.1143/JPSJ.65.3945
This paper investigates origin of the extra stability associated with particular values (magic numbers) of the total angular momentum of electrons in a quantum dot under strong magnetic field. The ground-state energy, distribution functions of density and angular momentum, and pair correlation function are calculated in the strong field limit by numerical diagonalization of the system containing up to seven electrons. It is shown that the composite fermion picture explains the small magic numbers well, while a simple geometrical picture does better as the magic number increases. Combination of these two pictures leads to identification of all the magic numbers. Relation of the magic-number states to the Wigner crystal and the fractional quantum Hall state is discussed.
Kuramoto Yoshio
Nishino Tomotoshi
Seki Taku
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