For authors
Submission status

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
VOLUME 59 (1994) | ISSUE 1 | PAGE 65
Theory of the spin gap in bilayer cuprates
A model of two planes of antiferromagnetically correlated electrons coupled together by a weak antiferromagnetic interaction of strength Я has been formulated and solved. It is shown that in-plane antiferromagnetic correlations dramatically enhance the pairing effect of the interplane interaction. For the case in which the in-plane correlation length к~~х is ~ T~b we find that the interaction λ leads to spin pairing at a temperature Τ*~λ much higher than the usual BCS result, exp( —J/λ). We suggest that this is a possible explanation of the spin-gap effects observed below T*~ 150 К in YBa2Cu306 6.