Published January 2010 | Version v1
Journal article Metadata-only

Perturbative theory of the non-equilibrium singlet-triplet transition

Creators

  • 1. Theoretical Physics Department, Institute of Physics, Budapest University of Technology and Economics, Budafoki ut 8, H-1521 Hungary (Hungary)
  • 2. Research Institute for Solid State Physics and Optics of the Hungarian Academy of Sciences, Konkoly-Thege M. ut 29-33., H-1121 Budapest (Hungary)

Description

We study equilibrium and non-equilibrium properties of a two-level quantum dot close to the singlet-triplet transition. We treat the on-site Coulomb interaction and Hund's rule coupling perturbatively within the Keldysh formalism. We compute the spectral functions and the differential conductance of the dot. For moderate interactions our perturbative approach captures the Kondo effect and many of the experimentally observed properties.

Availability note (English)

Available from http://dx.doi.org/10.1088/1742-6596/200/1/012063

Additional details

Identifiers

DOI
10.1088/1742-6596/200/1/012063;

Publishing Information

Journal Title
Journal of Physics. Conference Series (Online)
Journal Volume
200
Journal Issue
1
Journal Page Range
[4 p.]
ISSN
1742-6596

Conference

Title
International conference on magnetism
Acronym
ICM 2009
Dates
26-31 Jul 2009
Place
Karlsruhe (Germany)

INIS

Country of Publication
United Kingdom
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
42029607
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Resource subtype / Literary indicator
Conference
Descriptors DEI
COULOMB FIELD; COUPLING; ELECTRIC CONDUCTIVITY; ENERGY LEVELS; EQUILIBRIUM; KONDO EFFECT; MAGNETISM; QUANTUM DOTS; SPECTRAL FUNCTIONS; TRIPLETS
Descriptors DEC
ELECTRIC FIELDS; ELECTRICAL PROPERTIES; FUNCTIONS; MULTIPLETS; NANOSTRUCTURES; PHYSICAL PROPERTIES