Nonequilibrium magnetotransport through a quantum dot: An interpolative perturbative approach

Article

关键词: SINGLE-ELECTRON TRANSISTOR;    NUMERICAL RENORMALIZATION-GROUP;    PERIODIC ANDERSON MODEL;    LOCAL MOMENT APPROACH;    MAGNETIC-FIELD;    STATE PROPERTIES;    IMPURITY STATES;    HUBBARD-MODEL;    TRANSPORT;    EXPANSION;   

DOI  :  10.1103/PhysRevB.74.155125

来源: SCIE

【 摘 要 】

We study the differential conductance, spectral density, and magnetization for a quantum dot coupled to two conducting leads as a function of bias voltage V-ds, magnetic field B, and temperature T. The system is modeled with the Anderson model solved using a spin-dependent interpolative perturbative approximation in the Coulomb repulsion U that conserves the current. For large enough magnetic field, the differential conductance as a function of bias voltage shows split peaks. This splitting is larger than the corresponding splitting in the spectral density of states rho(d)(omega), in agreement with experiment.

【 授权许可】

Free