Do Interactions Increase or Reduce the Conductance of Disordered Electrons? It Depends!

1998/06/30 by Thomas Vojta, Frank Epperlein, Michael Schreiber · 3 citations
Engineering · Physics and Astronomy · #Molecular Junctions and Nanostructures #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #cond-mat.mes-hall #cond-mat.str-el

paper · pdf · doi:10.1103/physrevlett.81.4212

published as Phys. Rev. Lett. 81, 4212 (1998) · final version as publsihed, 4 pages REVTEX, 6 EPS figures included

openalex publication_date 1998/11/09 · arxiv created 1998/12/02 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We investigate the influence of electron-electron interactions on the conductance of two-dimensional disordered spinless electrons. We present an efficient numerical method based on diagonalization in a truncated basis of Hartree-Fock states to determine with high accuracy the low-energy properties in the entire parameter space. We find that weak interactions increase the dc conductance in the strongly localized regime while they decrease the dc conductance for weak disorder. Strong interactions always decrease the conductance. We also study the localization of single-particle excitations at the Fermi energy which turns out to be only weakly influenced by the interactions.

Citations

• Quantum Coulomb glass within a Hartree-Fock approximation
• Anderson Localization versus Delocalization of Interacting Fermions in One Dimension

Cited by

• Interacting electrons in a one-dimensional random array of scatterers: A quantum dynamics and Monte Carlo study
• Particle-Hole Symmetry and the Effect of Disorder on the Mott-Hubbard Insulator
• Persistent current and Drude weight in one-dimensional rings with substitution potentials