Theory of Fano-Kondo effect of transport properties through quantum dots

TL;DR

This paper presents a theoretical study of the Fano-Kondo effect in quantum dot transport, revealing temperature-dependent conductance features and crossover behavior using FT-DMRG calculations.

Contribution

It introduces a theoretical model for the Fano-Kondo effect in T-shaped quantum dots and analyzes conductance behavior across temperature regimes.

Findings

Identification of Fano asymmetric peaks at high temperatures

Observation of a Fano-Kondo plateau at low temperatures

Numerical calculation of conductance temperature dependence using FT-DMRG

Abstract

The Fano-Kondo effect in zero-bias conductance is investigated based on a theoretical model for the T-shaped quantum dot. The conductance as a function of the gate voltage is generally characterized by a Fano asymmetric parameter q. With varying temperature the conductance shows a crossover between the high and low temperature regions compared with the Kondo temperature T_K: two Fano asymmetric peaks at high temperatures and the Fano-Kondo plateau inside a Fano peak at low temperatures. Temperature dependence of conductance is calculated numerically by the Finite temperature density matrix renormalization group method (FT-DMRG).