Far-Infrared Excitations below the Kohn Mode: Internal Motion in a Quantum Dot

Preprint

1 February 2001

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/0102005

Abstract

We have investigated the far-infrared response of quantum dots in modulation doped GaAs heterostructures. We observe novel modes at frequencies below the center-of-mass Kohn mode. Comparison with Hartree-RPA calculations show that these modes arise from the flattened potential in our field-effect confined quantum dots. They reflect pronounced relative motion of the charge density with respect to the center-of-mass.

Keywords

INFRARED EXCITATIONS
RELATIVE MOTION
INTERNAL MOTION
CHARGE DENSITY
QUANTUM DOTS
FLATTENED
KOHN MODE
GAAS

All Related Versions

Version 1, 2001-02-01, ArXiv
Published version: Physical Review B, 63 (19), 195303.

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