Home
For authors
Submission status

Current
Archive
Archive (English)
   Volumes 21-40
   Volumes 1-20
   Volumes 41-62
      Volume 62
      Volume 61
      Volume 60
      Volume 59
      Volume 58
      Volume 57
      Volume 56
      Volume 55
      Volume 54
      Volume 53
      Volume 52
      Volume 51
      Volume 50
      Volume 49
      Volume 48
      Volume 47
      Volume 46
      Volume 45
      Volume 44
      Volume 43
      Volume 42
      Volume 41
Search
VOLUME 57 (1993) | ISSUE 5 | PAGE 313
Cooper instability of a metallic phase in the Hubbard model with repulsion
The Hubbard model with a local repulsion and a half-filled band is analyzed on a hypercubic lattice. A canonical transformation to electrons and holes reveals a local attraction of these entities and a Cooper instability with respect to their combining to form neutral pairs, i.e., excitons. The ground state of the model is thus an insulator for any finite interaction. It is a state like that of the BCS model, in which excitons play the role of the Cooper pairs.