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Collective excitations in the superconducting phase of the one-band Hubbard model. (English. Russian original) Zbl 0854.58048
Theor. Math. Phys. 102, No. 3, 331-335 (1995); translation from Teor. Mat. Fiz. 102, No. 3, 457-462 (1995).
Summary: The method of functional integration is used to investigate the collective excitations in the superconducting state of the one-band two-dimensional Hubbard model with repulsion. The energy spectrum of the Bose modes is obtained. The existence of a branch of Bogolyubov sound is demonstrated. The phase structure and symmetry of the model are also considered.
58Z05 Applications of global analysis to the sciences
82D55 Statistical mechanical studies of superconductors
Full Text: DOI
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