NEUTRON-SCATTERING AND SUPERCONDUCTING ORDER-PARAMETER IN YBA2CU3O7

Authors
MAZIN II YAKOVENKO VM
Citation
Ii. Mazin et Vm. Yakovenko, NEUTRON-SCATTERING AND SUPERCONDUCTING ORDER-PARAMETER IN YBA2CU3O7, Physical review letters, 75(22), 1995, pp. 4134-4137
Citations number
27
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
75
Issue
22
Year of publication
1995
Pages
4134 - 4137
Database
ISI
SICI code
0031-9007(1995)75:22<4134:NASOIY>2.0.ZU;2-8
Abstract
We discuss the origin of the neutron scattering peak at 41 meV observe d in YBa2Cu3O7 below T-c. The peak may occur due to spin-flip electron excitations across the superconducting gap which are enhanced by the antiferromagnetic interaction between Cu spins. In this picture, the e xperiment is most naturally explained if the superconducting order par ameter has s-wave symmetry and opposite signs in the bonding and antib onding electron bands formed within a Cu2O4 bilayer.