Conductance plateau in quantum spin transport through an interacting quantum dot

TL;DR

This paper investigates quantum spin transport in an interacting quantum dot, revealing a conductance plateau in the non-linear charge conductance under spin bias in the Kondo regime, linked to electron correlations.

Contribution

It introduces the conductance plateau as a new characteristic feature of quantum spin transport arising from electron correlations in the Kondo regime.

Findings

Conductance plateau appears in non-linear charge conductance with spin bias.

Plateau originates from strong electron correlations and exchange processes.

Identifies the plateau as a key feature in quantum spin transport.

Abstract

Quantum spin transport is studied in an interacting quantum dot. It is found that a conductance "plateau" emerges in the non-linear charge conductance by a spin bias in the Kondo regime. The conductance plateau, as a complementary to the Kondo peak, originates from the strong electron correlation and exchange processes in the quantum dot, and can be regarded as one of the characteristics in quantum spin transport.