Correlations between ground and excited state spectra of a quantum dot

D. R. Stewart, D. Sprinzak, C. M. Marcus, C. I. Duruöz, J. S. Harris

Research output: Contribution to journalReview articlepeer-review


The ground and excited state spectra of a semiconductor quantum dot with successive electron occupancy were studied with linear and nonlinear magnetoconductance measurements. A direct correlation was observed between the ruth excited state of the N-electron system and the ground state of the (N + m)-electron system for m up to 4. The results are consistent with a single-particle picture in which a fixed spectrum of energy levels is successively filled, except for a notable absence of spin degeneracy. Further departures from the single-particle picture due to electron-electron interaction were also observed. Magnetoconductance fluctuations of ground states show anti-crossings where wave function characteristics are exchanged between adjacent levels.

Original languageEnglish
Pages (from-to)1784-1788
Number of pages5
Issue number5344
StatePublished - 5 Dec 1997
Externally publishedYes


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