Abstract
The quantum states of interacting electrons in circular and elliptical quantum dots in a magnetic field are investigated. We model the elliptical dot with two orthonormal parabolic confinement potentials of different strengths and utilize analytical forms of the single-electron states. The high-spin state of the four electron system consistent with Hund's first rule present in a circular dot near zero field becomes unstable as the dot shape becomes deformed from the circular symmetry. The excitation spectra of the three and four electron systems are compared with experiments. The stability of high-spin states realized near single-electron level crossings at finite magnetic fields is discussed.
Published Version
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