Physics – Condensed Matter
Scientific paper
1995-09-14
Physics
Condensed Matter
REVTeX documentstyle, 34 pages, 10 figures included
Scientific paper
10.1103/PhysRevB.53.6786
We discuss the allowed order parameter symmetries in multi-layer cuprates and their physical consequences using highly non-specific forms of the inter- and intra-plane interactions. Within this framework, the bi-layer case is discussed in detail with particular attention paid to the role of small orthorhombic distortions as would derive from the chains in YBCO or superlattice effects in BSCCO. In the orthorhombic bi-layer case the (s,-s) state is of special interest, since for a wide range of parameters this state exhibits pi phase shifts in corner Josephson junction experiments. In addition, its transition temperature is found to be insensitive to non-magnetic inter-plane disorder, as would be present at the rare earth site in YBCO, for example. Of particular interest, also, are the role of van Hove singularities which are seen to stabilize states with d_{x^2 - y^2}-like symmetry, (as well as nodeless s-states) and to elongate the gap functions along the four van Hove points, thereby leading to a substantial region of gaplessness. We find that d_{x^2 - y^2}-like states are general solutions for repulsive interactions; they possess the fewest number of nodes and therefore the highest transition temperatures. In this way, they should not be specifically associated with a spin fluctuation driven pairing mechanism.
Levin Kathryn
Liu Dang-Zheng
Malý Jan
No associations
LandOfFree
Superconducting Order Parameter Symmetry in Multi-layer Cuprates does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Superconducting Order Parameter Symmetry in Multi-layer Cuprates, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Superconducting Order Parameter Symmetry in Multi-layer Cuprates will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-158696