Theoretical Reproduction of the Lineshapes of Nonlinear Conductance Observed in a Quantum Point Contact

2010/02/06 by Jongbae Hong, Hong, Jongbae
Computer Science · Engineering · Physics and Astronomy · #FOS: Physical sciences #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Molecular Junctions and Nanostructures #Quantum Information and Cryptography #Quantum and electron transport phenomena #Strongly Correlated Electrons (cond-mat.str-el) #cond-mat.mes-hall #cond-mat.str-el

paper · pdf · doi:10.48550/arxiv.1002.1367

This paper will be fully revised. 4 pages, 4 figures

openalex publication_date 2010/02/06 · arxiv created 2013/01/24 · arxiv updated 2013/01/25 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

The nonlinear conductance observed in a quantum point contact is theoretically reproduced for the entire range of applied bias. The single-impurity Anderson model with two reservoirs at different chemical potentials is studied for a sequential change of the gate voltage. The imbalance in the left and right Kondo coupling strength is introduced by the displacement of the Kondo impurity by the electric field produced in the constriction of quantum point contact. We reveal the origin of the side peaks and study the behavior of the height and width of the zero-bias anomaly.

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