WebDec 20, 1991 · The phase diagram for spin 1/2 fermions with attractive interband interactions (- V ) is obtained for the two-band Hubbard model in the space of - V , intraband repulsion ( U ), and the band filling from the quantum Monte Carlo calculation along with the mean-field theory in one dimension.The competition of an off-diagonal … WebJan 25, 2012 · Abstract. Pairing near CDW and SDW metal-semiconductor transitions is analyzed for a 2-D lattice within an RPA approximation. We find that s-wave pairing can …
International Journal of Modern Physics B Vol 01, No 03n04
WebReferences Listed. These are the references the publisher has listed as being connected to the article. Please check the article itself for the full list of references which may differ. Webinteraction may account for the pseudogap phenomenon above T c only in the p-type cuprate ... spin- and phonon-mediated pairing mechanisms have been most discussed [4, 7]. The ... such as collective modes in the form of SDW [10, 11], CDW [3], or stag-gered flux (also known as the d-density wave DDW)[12], can either coexist with SC or be ... the gaylord at the rockies
Triplet Superconducting Pairing and Density-Wave …
WebPairing near CDW and SDW metal-semiconductor transitions is analyzed for a 2-D lattice within an RPA approximation. We find that s-wave pairing can occur near the CDW … WebSDW instabihty the interaction V, (p',p), Eq. (1),is posi-tive definite. However, its Fourier transform can oscillate and the electrons making up a pair can arrange their space-time correlations to fit into the attractive regions. " To see this in more detail, consider the pairing interaction for p 0. From Fig. 2, it is clear that Xp peaks at ... Webdifferent values of the interchain interactions, ~g? 1 0, 0.11, and 0.14, corresponding to the three different sequen-ces of phase transitions as a function of t0?: SDW!SCd, SDW!CDW! SCf, and CDW!SCf. In the absence of interchain interactions, the effective interaction mediated by spin fluctuations is attractive in the d x 2 y - and f-wave ... the gayley