Conductance through Quantum Dots Studied by Finite Temperature DMRG

Details Conductance through Quantum Dots Studied by Finite Temperature DMRG Conductance through Quantum Dots Studied by Finite Temperature DMRG

2004-06-24

arxiv.org/abs/cond-mat/0406594v1

J. Phys. Soc. Jpn 73, 434-440 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

14 pages, 13 fiures

Scientific paper

10.1143/JPSJ.73.434

With the Finite temperature Density Matrix Renormalization Group method (FT-DMRG), we depeloped a method to calculate thermo-dynamical quantities and the conductance of a quantum dot system. Conductance is written by the local density of states on the dot. The density of states is calculated with the numerical analytic continuation from the thermal Green's function which is obtained directly from the FT-DMRG. Typical Kondo behaviors in the quantum dot system are observed conveniently by comparing the conductance with the magnetic and charge susceptibilities: Coulomb oscillation peaks and the unitarity limit. We discuss advantage of this method compared with others.

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