Transmission Coefficient of Ballistic Quantum Dot
Lev G. Mourokh, Jonathan P. Bird
TL;DR
This paper investigates how the transmission coefficient of a ballistic quantum dot varies with electric field, revealing peaks and negative differential transmission, and discusses experimental observation conditions.
Contribution
It introduces the dependence of transmission on transfer time and electric field in ballistic quantum dots, highlighting observable effects like peaks and negative differential transmission.
Findings
Transmission exhibits pronounced peaks as a function of electric field.
Regions of negative differential transmission are identified.
Conditions for experimental observation are discussed.
Abstract
We analyze the electron transmission through a ballistic quantum dot which is connected to two quantum point contacts. We demonstrate that the transmission and reflection of this structure is determined by the transfer time of the quantum-dot region which, in turn, is dependent on the applied electric field. The electric-field dependence of the transmission coefficient exhibits clearly pronounced peaks, and regions with negative differential transmission, and we discuss the conditions that should be satisfied in order to observe these effects in experiment.
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Taxonomy
TopicsSemiconductor Quantum Structures and Devices · Quantum and electron transport phenomena · Molecular Junctions and Nanostructures