Molecular phases in coupled quantum dots

Preprint

9 January 2004

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/0401145

Abstract

We present excitation energy spectra of few-electron vertically coupled quantum dots for strong and intermediate inter-dot coupling. By applying a magnetic field, we induce ground state transitions and identify the corresponding quantum numbers by comparison with few-body calculations. In addition to atomic-like states, we find novel "molecular-like" phases. The isospin index characterizes the nature of the bond of the artificial molecule and this we control. Like spin in a single quantum dot, transitions in isospin leading to full polarization are observed with increasing magnetic field.

Keywords

COUPLED QUANTUM DOTS
PRESENT EXCITATION
STATE TRANSITIONS
EXCITATION ENERGY
MAGNETIC FIELD
QUANTUM DOTS
ISOSPIN

All Related Versions

Version 1, 2004-01-09, ArXiv
Published version: Physical Review B, 69 (8).

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