1002.1367 (Jongbae Hong)

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

Jongbae Hong

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.

View original: http://arxiv.org/abs/1002.1367