Ground-state energy and spin in disordered quantum dots

Kenji Hirose, Ned S. Wingreen

Research output: Contribution to journalArticlepeer-review

28 Scopus citations


We investigate the ground-state energy and spin of disordered quantum dots using spin-density-functional theory. Fluctuations of addition energies (Coulomb-blockade peak spacings) do not scale with average addition energy but remain proportional to level spacing. With increasing interaction strength, the even-odd alternation of addition energies disappears, and the probability of nonminimal spin increases, but never exceeds 50%. Within a two-orbital model, we show that the off-diagonal Coulomb matrix elements help stabilize a ground state of minimal spin.

Original languageEnglish (US)
Article number193305
Pages (from-to)1933051-1933054
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number19
StatePublished - May 15 2002

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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