Liaison between superconductivity and phase separation

S. Haas; E. Dagotto; A. Nazarenko; J. Riera

doi:10.1103/PhysRevB.51.5989

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Liaison between superconductivity and phase separation

S. Haas, E. Dagotto, A. Nazarenko, J. Riera

DOI 10.1103/PhysRevB.51.5989 · Physical Review B

T1

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Abstract

Models of strongly correlated electrons that tend to phase separate are studied including a long-range 1/r repulsive interaction. It is observed that charge-density-wave states become stable as the strength of the 1/r term, Vcoul, is increased. Due to this effect, the domain of stability of the superconducting phases that appear near phase separation at Vcoul=0 is not enlarged by a 1/r interaction as naively expected. Nevertheless, superconductivity exists in a finite region of parameter space, even if phase separation is suppressed. Our results have implications for some theories of the cuprates.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
La2CuO4+y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	38	Pressure not reported	unknown