Artículos de revistas
The Long-range Coulomb Effects To The Phase Oscillations Of The Incommensurate Spin Density Wave
Journal Of The Physical Society Of Japan. , v. 54, n. 10, p. 3909 - 3914, 1985.
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.541039093914