Resonant transmission through an open quantum dot

TL;DR

This paper investigates the transport properties of a quantum dot in a 1D channel, revealing quantized conductance and Coulomb charging effects through resonant tunneling peaks at low temperatures.

Contribution

It provides new insights into the resonant tunneling behavior and Coulomb charging effects in open quantum dots under various magnetic fields and biases.

Findings

Quantized ballistic conductance plateaus observed

Resonant tunneling peaks identified between conductance plateaus

Coulomb charging causes splitting of resonant structures at zero magnetic field

Abstract

We have measured the low-temperature transport properties of a quantum dot formed in a one-dimensional channel. In zero magnetic field this device shows quantized ballistic conductance plateaus with resonant tunneling peaks in each transition region between plateaus. Studies of this structure as a function of applied perpendicular magnetic field and source-drain bias indicate that resonant structure deriving from tightly bound states is split by Coulomb charging at zero magnetic field.