Addition spectrum and Koopmans' theorem for disordered quantum dots

Article

关键词: COULOMB-BLOCKADE REGIME;    GROUND-STATE ENERGY;    MESOSCOPIC FLUCTUATIONS;    PERSISTENT CURRENTS;    INTERACTING SYSTEMS;    PEAK SPACINGS;    STATISTICS;    CAPACITANCE;    SPIN;   

DOI  :  10.1103/PhysRevB.60.2541

来源: SCIE

【 摘 要 】

We investigate the addition spectrum of disordered quantum dots containing spinless interacting fermions using the self-consistent Hartree-Fock approximation. We concentrate on the regime r(s) greater than or equal to 1, with finite dimensionless conductance g. We find that in this approximation the peak spacing fluctuations do not scale with the mean single-particle level spacing for either Coulomb or nearest-neighbor interactions when r(s) greater than or equal to 1. We also show that Koopmans' approximation to the addition spectrum can lead to errors that are of order the mean level spacing or larger, both in the mean addition spectrum peak spacings, and in the peak spacing fluctuations. [S0163-1829(99)09727-1].

【 授权许可】

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