Conductance Spectroscopy in Coupled Quantum Dots

Gerhard Klimeck, Purdue University - Main Campus
Guanlong Chen, Purdue University - Main Campus
Supriyo Datta, Purdue University - Main Campus

Date of this Version



Phys. Rev. B., Vol. 50 Number 4 (1994) 2316


This is the published version of Gerhard Klimeck, Guanlong Chen, and Supriyo Datta. (15 July 1994). "Conductance spectroscopy in coupled quantum dots". First published in the Physical Review B and is available online at:


We investigate the linear-response conductance through a pair of coupled quantum dots. The conductance spectrum under ideal conditions is shown to consist of two sets of twin peaks whose locations and amplitudes are determined by the interdot coupling and the intradot charging. We will show that the qualitative features of the spectrum survive against experimental nonidealities such as (1) detuning of the individual dots, (2) interdot charging, (3) inelastic scattering, and (4) multiple lateral states. The effect of higher lateral states depends strongly on the nature of the interaction potential, screening lengths, and exchange terms, but the lowest set of twin peaks is largely unaffected by these details.


Nanoscience and Nanotechnology