Confinement-induced enhancement of electron-electron interactions in open quantum-dot arrays

M. Elhassan, N. Aoki, Y. Aoyagi, C. Prasad, L. Shifren, D. K. Ferry, J. P. Bird, A. Shailos, Y. Ochiai, L. H. Lin, K. Ishibashi

Research output: Contribution to journalArticlepeer-review

Abstract

We study the properties of the logarithmic variation observed in the temperature-dependent conductance of open quantum-dot arrays. The magnitude of this variation is found to exhibit a well-defined scaling with system size, and is also found to be unaffected by the application of magnetic fields sufficient to break time-reversal symmetry. We suggest that these characteristics are consistent with the logarithmic variation resulting from a confinement-induced enhancement of electron interactions in the arrays. In particular, we note that the size-dependent scaling of this term is similar to that which we would expect for a system whose boundary interactions act to amplify the mutual repulsion of electrons trapped within it.

Original languageEnglish (US)
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume63
Issue number24
DOIs
StatePublished - 2001

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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