Charge-density wave with imperfect nesting and superconductivity. II.
Masahiko Ichimura, Mitsutaka Fujita, Kenji Nakao
DOI 10.1103/PhysRevB.43.175 · Physical Review B
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Abstract
We study the effect of the imperfect-nesting charge-density wave (CDW) on the superconducting critical temperature Tc by a canonical treatment of the system. From an examination of the CDW phase diagram within a mean-field approximation, the metallic CDW phases with a huge density of states are found to exist as a stable solution although they are unstable in the grand canonical case. Calculating Tc from the phase diagram, we find that Tc is enhanced in these metallic phases compared with the case of an absence of CDW. The behaviors of Tc and CDW gap for various electron fillings show qualitative similarity to those observed in BaPb1−xBixO3.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| BaPb1-xBixO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 12 | Pressure not reported | unknown |
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