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Special phonons and superconductivity in the hexagonal tungsten bronzes

Journal Article · · Phys. Rev. Lett.; (United States)

Neutron scattering measurements on single crystals of hexagonal tungsten bronzes M/sub 0.33/WO/sub 3/ reveal low-frequency, relatively dispersionless phonon branches which can be associated with the vibrations of the metal atoms M in the large open channels they occupy in the crystal structure. An analysis based on Eliashberg theory shows that the strong dependence of the superconducting transition temperature on the species M arises from these special phonons.

Research Organization:
Ames Laboratory--United States Department of Energy and Department of Physics, Iowa State University, Ames, Iowa 50011
DOE Contract Number:
W-7405-ENG-82
OSTI ID:
5775289
Journal Information:
Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 43:21; ISSN PRLTA
Country of Publication:
United States
Language:
English

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