Interaction effects in Aharonov-Bohm-Kondo rings

Article

关键词: DILUTE MAGNETIC-ALLOYS;    QUANTUM DOTS;    IMPURITIES;    SCATTERING;    SYSTEMS;    ENERGY;    FIELD;   

DOI  :  10.1103/PhysRevB.88.245104

来源: SCIE

【 摘 要 】

We study the conductance through an Aharonov-Bohm ring, containing a quantum dot in the Kondo regime in one arm, at finite temperature and arbitrary electronic density. We develop a general method for this calculation based on changing the basis to the screening and nonscreening channels. We show that an unusual term appears in the conductance, involving the connected four-point Green's function of the conduction electrons. However, this term and the terms quadratic in the T matrix can be eliminated at sufficiently low temperatures, leading to an expression for the conductance linear in the Kondo T matrix. Explicit results are given for temperatures that are high compared to the Kondo temperature.

【 授权许可】

Free