2003/06/25 by K. A. Muller, K. A. Müller
Materials Science · Mathematics · Physics and Astronomy · #Advanced Condensed Matter Physics #Artificial intelligence #Computer science #Condensed matter physics #Crossover #Cuprate #Geometry #Magnetic and transport properties of perovskites and related materials #Mathematics #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Superconductivity #Surface (topology) #Wave function #cond-mat.supr-con
paper · pdf · doi:10.1023/b:josc.0000011831.52509.11
6 pages, 2 figures
arxiv created 2003/06/25 · openalex publication_date 2004/01/16 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The concept of a surface d- and bulk s-symmetry in cuprate superconductors is applied to recent small-angle neutron-scattering results. These show a change of hexagonal to square vortex lattice as a function of the magnetic field along the c-axis. Identifying the hexagonal lattice with s- and the square with d-symmetry, the crossover distance from the surface d to the bulk s perpendicular to the c-axis is estimated to be 35 nm for LSCO and roughly 7 nm for YBCO, both at optimum doping. The crossover along the c-axis has to be of only a few layers distance to reconcile tunneling, photoemission and pulsed femtosecond reflectivity experiments. These estimates are compatible with m-rotation, NMR and other experiments.