Nonthermal broadening in the conductance of double quantum dot structures
Laszlo Oroszlany, Andor Kormanyos, Janos Koltai, Jozsef Cserti and, Colin Lambert
TL;DR
This paper investigates how temperature affects conductance in double quantum dot structures, revealing a unique nonthermal broadening effect when the dot energy levels are detuned.
Contribution
It introduces the concept of nonthermal broadening in conductance resonance due to finite temperature and level detuning in double quantum dots.
Findings
Conductance depends on level attraction and interdot tunneling at zero temperature.
Finite temperature causes a nonthermal broadening of conductance resonance.
Nonthermal broadening occurs notably when individual dot energy levels are detuned.
Abstract
We study the transport properties of a double quantum dot (DQD) molecule at zero and at finite temperature. The properties of the zero temperature conductance depends on whether the level attraction between the symmetric and antisymmetric states of the DQD, produced by the coupling to the leads, exceeds or not the interdot tunneling. For finite temperature we find a remarkable nonthermal broadening effect of the conductance resonance, when the energy levels of the individual dots are detuned.
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