Integer filling factor phases in vertical diatomic artificial molecules

D.G Austing,S Tarucha,K Muraki,F Ancilotto,M Barranco,A Emperador,R Mayol,M Pi

doi:10.1016/j.physe.2003.12.055

Integer filling factor phases in vertical diatomic artificial molecules

D.G Austing, S Tarucha + Show 6 more

https://doi.org/10.1016/j.physe.2003.12.055

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Journal: Physica E: Low-dimensional Systems and Nanostructures

Publication Date: Feb 7, 2004

Affiliation: University of Trento, The University of Tokyo, NTT Basic Research Laboratories, Institute for Microstructural Sciences, University of Barcelona, Istituto Nazionale per la Fisica della Materia, University of Padua

#Inter-dot Coupling #Local-spin Density + Show 8 more

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Abstract

We investigate integer filling factor phases of many- N-electron vertically coupled semiconductor quantum dot artificial molecules when the inter-dot coupling is strong and weak. The experimental results are analyzed within local-spin density- functional theory. Maximum density droplets composed of electrons in both bonding and anti-bonding, or just bonding states are revealed. Interesting isospin physics (i.e., isospin transitions) can occur particularly when the inter-dot coupling is reduced.

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