Finite-thickness effects in ground-state transitions of two-electron quantum dots

Article

关键词: MAGNETIC-FIELD;    CAPACITANCE SPECTROSCOPY;    ARTIFICIAL ATOMS;   

DOI  :  10.1103/PhysRevB.76.193306

来源: SCIE

【 摘 要 】

Using the exactly solvable excitation spectrum of two-electron quantum dots with parabolic potential, we show that the inclusion of the vertical extension of the quantum dot provides a consistent description of the experimental findings of Nishi [Phys. Rev. B 75, 121301(R) (2007)]. We found that the second singlet-triplet transition in the ground state is a vanishing function of the lateral confinement in the three-dimensional case, while it always persists in the two-dimensional case. We show that a slight decrease of the lateral confinement leads to a formation of the Wigner molecule at low magnetic fields.

【 授权许可】

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