Low-lying excitations in superconducting bilayer systems

Physics – Condensed Matter – Superconductivity

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Latex, three postscript figures; replaced to correct page format errors

Scientific paper

10.1139/cjp-78-2-119

The ground and first excited state of two superconducting layers in interaction are studied considering two different coupling terms, one represented by the standard Josephson interaction, and one new, which is a superexchange pairing force between bilayer pairs. It is shown that a moderate-to strong Josephson interaction produces a low-lying collective state, pictured as an out-of-phase oscillation of the BCS gauge angles of the two layers. This antisymmetric angular oscillation might explain the 41 meV resonance observed in the neutron scattering experiments. The bilayer pairs are formed by electrons from different layers with an antiparallel orientation of the spins, being related to the antiferromagnetic arrangement. The pair operators within the layers together with the bilayer pairs generate by commutation an so(5) algebra. It is shown that the transition between the superconducting and antiferromagnetic phases can be explained assuming the dependence on concentration of the bilayer pairing strength, with maximum at half-filling.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Low-lying excitations in superconducting bilayer systems 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 Low-lying excitations in superconducting bilayer systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low-lying excitations in superconducting bilayer systems will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-21795

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.