Ac-cotunneling through an interacting quantum dot under a magnetic field

TL;DR

This paper investigates inelastic cotunneling in an interacting quantum dot under magnetic field and time-dependent bias, revealing photon-assisted features and conductance suppression, with predictions of a zero-anomaly at specific frequencies.

Contribution

It provides a theoretical analysis of photon-assisted cotunneling and predicts a zero-anomaly in differential conductance under certain driving conditions.

Findings

Photon-assisted satellites observed in conductance.

Suppression of differential conductance with increased driving amplitude.

Prediction of a zero-anomaly at specific frequencies.

Abstract

We analyze inelastic cotunneling through an interacting quantum dot subject to an ambient magnetic field in the weak tunneling regime under a non-adiabatic time-dependent bias-voltage. Our results clearly exhibit photon-assisted satellites and an overall suppression of differential conductance with increasing driving amplitude, which is consistent with experiments. We also predict a zero-anomaly in differential conductance under an appropriate driving frequency.