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Fermi-Liquid Interactions in d-Wave Superconductor | | M. B. Walker
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11 Jul 2000 | | Journal: | Phys. Rev. B 64, 134515 (2001). | | Subject: | Superconductivity | cond-mat.supr-con | | Abstract: | This article develops a quantitative quasiparticle model of the low-temperature properties of d-wave superconductors which incorporates both Fermi-liquid effects and band-structure effects. The Fermi-liquid interaction effects are found to be classifiable into strong and negligible renormalizaton effects, for symmetric and antisymmetric combinations of the energies of $kuparrow$ and $-kdownarrow$ quasiparticles, respectively. A particularly important conclusion is that the leading clean-limit temperature-dependent correction to the superfluid density is not renormalized by Fermi-liquid interactions, but is subject to a Fermi velocity (or mass) renormalization effect. This leads to difficulties in accounting for the penetration depth measurements with physically acceptable parameters, and hence reopens the question of the quantitative validity of the quasiparticle picture. | | Source: | arXiv, cond-mat/0007177 | | Services: | Forum | Review | PDF | Favorites | |
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