Experimental and Theoretical Constraints of Bipolaronic Superconductivity in High Tc Materials: An Impossibility

B. K. Chakraverty; J. Ranninger; D. Feinberg

doi:10.1103/PhysRevLett.81.433

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Experimental and Theoretical Constraints of Bipolaronic Superconductivity in High Tc Materials: An Impossibility

B. K. Chakraverty, J. Ranninger, D. Feinberg

DOI 10.1103/PhysRevLett.81.433 · Physical Review Letters

T1

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Abstract

The bipolaronic scenario for high Tc superconductivity is critically examined. The underlying assumption that at low temperatures all the charge carriers exist in the form of itinerant bipolarons is shown to be incompatible on theoretical and experimental grounds. Superfluidity of such bipolarons cannot give the values of Tc nor explain the fermionic nature of the quasiparticles observed in the cuprates.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O6+x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	100	Pressure not reported	unknown
YBa2Cu3O6.97 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	100	Pressure not reported	unknown
YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown