Coulomb-blockade peak-spacing distribution: Interplay of temperature and spin

Journal Article

We calculate the Coulomb-blockade peak-spacing distribution at finite temperature using the recently introduced “universal Hamiltonian” to describe the (formula presented) interactions. We show that the temperature effect is important even at (formula presented) (formula presented) is the single-particle mean level spacing). This sensitivity arises because: 1) exchange reduces the minimum energy of excitation from the ground state, and 2) the entropic contribution depends on the change of the spin of the quantum dot. Including the leading corrections to the universal Hamiltonian yields results in quantitative agreement with the experiments. Surprisingly, temperature appears to be the most important effect. © 2001 The American Physical Society.

Full Text

Duke Authors

Cited Authors

  • Usaj, G; Baranger, HU

Published Date

  • January 1, 2001

Published In

Volume / Issue

  • 64 / 20

Electronic International Standard Serial Number (EISSN)

  • 1550-235X

International Standard Serial Number (ISSN)

  • 1098-0121

Digital Object Identifier (DOI)

  • 10.1103/PhysRevB.64.201319

Citation Source

  • Scopus