Excitation spectrum of two correlated electrons in a lateral quantum dot with negligible Zeeman splitting

Simple item page
dc.creatorEllenberger, C.
dc.creatorIhn, T.
dc.creatorYannouleas, C.
dc.creatorLandman, U.
dc.creatorEnsslin, K.
dc.creatorDriscoll, D.
dc.creatorGossard, A. C.
dc.date2005-12-16
dc.date.accessioned2026-07-07T06:53:27Z
dc.date.available2026-07-07T06:53:27Z
dc.descriptionThe excitation spectrum of a two-electron quantum dot is investigated by tunneling spectroscopy in conjuction with theoretical calculations. The dot made from a material with negligible Zeeman splitting has a moderate spatial anisotropy leading to a splitting of the two lowest triplet states at zero magnetic field. In addition to the well-known triplet excitation at zero magnetic field, two additional excited states are found at finite magnetic field. The lower one is identified as the second excited singlet state on the basis of an avoided crossing with the first excited singlet state at finite fields. The measured spectra are in remarkable agreement with exact diagonalization calculations. The results prove the significance of electron correlations and suggest the formation of a state with Wigner-molecular properties at low magnetic fields.
dc.description5 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0512410
dc.identifierhttp://arxiv.org/abs/cond-mat/0512410
dc.identifierPhys. Rev. Lett. 96, 126806 (2006)
dc.identifierdoi:10.1103/PhysRevLett.96.126806
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/105590
dc.subjectMesoscale and Nanoscale Physics
dc.titleExcitation spectrum of two correlated electrons in a lateral quantum dot with negligible Zeeman splitting
dc.typetext

Files

Collections

arXiv