Charge-density wave with imperfect nesting and superconductivity

Masahiko Ichimura; Mitsutaka Fujita; Kenji Nakao

doi:10.1103/PhysRevB.41.6387

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Charge-density wave with imperfect nesting and superconductivity

Masahiko Ichimura, Mitsutaka Fujita, Kenji Nakao

DOI 10.1103/PhysRevB.41.6387 · Physical Review B

T1

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Abstract

We study the effect of the existence of the charge-density waves (CDW) on superconductivity within a mean-field approximation. When the band is slightly deformed to introduce the imperfect-nesting condition for the commensurate CDW, the metallic CDW states appear where a part of the Fermi surface is ungapped. We examine the phase diagram of the imperfect-nesting CDW states and the behavior of the superconducting critical temperature (Tc) on it. We find that the presence of the CDW always drives the Tc down.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Ba1-xKxBiO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	30	Pressure not reported	unknown
(La1-xAx)2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
YBa2Cu3O6+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
BaPb1-xBixO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	13	Pressure not reported	unknown