T. Wen et al., New exact solution formula for specific heat-phonon spectrum inversion andits application in studies of superconductivity, PHYSICA C, 341, 2000, pp. 1919-1920
A new exact solution for specific heat-phonon spectrum inversion using real
functions is presented. This solution contains all the merits of the Debye
scheme, and, in addition, the solution set is complete. The phonon spectru
m of YBCO obtained by this new formula is consistent with that from neutron
scattering.