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Phason modes in spin-density wave in the presence of long-range Coulomb interaction | Attila Virosztek
; Kazumi Maki
; | Date: |
24 Nov 1993 | Abstract: | We study the effect of long-range Coulomb interaction on the phason in spin-density wave (SDW) within mean field theory. In the longitudinal limit and in the absence of SDW pinning the phason is completely absorbed by the plasmon due to the Anderson-Higgs mechanism. In the presence of SDW pinning or when the wave vector {f q} is tilted from the chain direction, though the plasmon still almost exhausts the optical sum rule, another optical mode appears at $omega < 2Delta(T)$, with small optical weight. This low frequency mode below the SDW gap may be accessible to electron energy loss spectroscopy (EELS). | Source: | arXiv, cond-mat/9311056 | Services: | Forum | Review | PDF | Favorites |
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