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Type: Artigo de periódico
Title: The Long-range Coulomb Effects To The Phase Oscillations Of The Incommensurate Spin Density Wave
Author: Kurihara Y.
Abstract: We have investigated the long-range Coulomb effects to coupled modes of the phase oscillation of the incommensurate spin density wave and the charge density fluctuations at zero temperature for situations A and B where band electrons completely lose the itinerant character with appearance of the single excitation gap in A and they still retain this character in B. For A there exists the only one coupled mode at zero momentum for finite frequencies region. This mode has a pole at the plasma frequency just as the Bogoliubov-Anderson mode has in the superconductor. For B there is a possibility of a linear spectrum existing with the velocity of order of the Fermi velocity under certain conditions in contrast with A lacking in this linear spectrum. The longitudinal susceptibility is expressed in terms of the amplitude and phase oscillations of the spin density wave.
Rights: fechado
Identifier DOI: 
Date Issue: 1985
Appears in Collections:Unicamp - Artigos e Outros Documentos

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