Physics – Condensed Matter
Scientific paper
1994-10-18
Physics
Condensed Matter
3 pages, LaTeX, 2 ps figures available on request to ahoff@phys2.rwth-aachen.de
Scientific paper
10.1007/BF00752288
By means of electronic Raman scattering we investigated the symmetry of the energy gap Delta(k), its temperature dependence and its variation with doping of well characterized Bi2Sr2CaCu2O8+delta single crystals. The oxygen content delta was varied between the under- and the overdoped regime by subsequently annealing the same single crystal in Ar and O2, respectively. The symmetry analysis of the polarized electronic Raman scattering is consistent with a d_x^2-y^2-wave symmetry of the energy gap in both regimes. The gap ratio 2Delta_max/k_BT_c and its temperature dependence changes with doping similar to predictions of theories based on paramagnon coupling.
Guentherodt Gernot
Hoffmann Achim
Lemmens Peter
Winkeler L.
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