Physics – Condensed Matter
Scientific paper
1995-02-15
Phys. Rev. Lett. 75, 4126 (1995)
Physics
Condensed Matter
revtex, epsf.sty or psbox.tex, 5 pages, 1 ps figure (uuencoded .tar.Z file)
Scientific paper
10.1103/PhysRevLett.75.4126
Recent polarized neutron scattering experiments on $YBa_2 Cu_3 O_7$ have revealed a sharp spectral peak at the $(\pi,\pi)$ in reciprocal lattice centered around the energy transfer of $41\ meV$. We offer a theoretical explanation of this remarkable experiment in terms of a new collective mode in the particle particle channel of the Hubbard model. This collective mode yields valuable information about the symmetry of the superconducting gap.
Demler Eugene
Zhang Shou-Cheng
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