Proposed Parametric Cooling of Bilayer Cuprate Superconductors by Terahertz Excitation

S. J. Denny; S. R. Clark; Y. Laplace; A. Cavalleri; D. Jaksch

doi:10.1103/PhysRevLett.114.137001

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Proposed Parametric Cooling of Bilayer Cuprate Superconductors by Terahertz Excitation

S. J. Denny, S. R. Clark, Y. Laplace, A. Cavalleri, D. Jaksch

DOI 10.1103/PhysRevLett.114.137001 · Physical Review Letters

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Abstract

We propose and analyze a scheme for parametrically cooling bilayer cuprates based on the selective driving of a c-axis vibrational mode. The scheme exploits the vibration as a transducer making the Josephson plasma frequencies time dependent. We show how modulation at the difference frequency between the intrabilayer and interbilayer plasmon substantially suppresses interbilayer phase fluctuations, responsible for switching c-axis transport from a superconducting to a resistive state. Our calculations indicate that this may provide a viable mechanism for stabilizing nonequilibrium superconductivity even above Tc, provided a finite pair density survives between the bilayers out of equilibrium.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
La1.675Eu0.2Sr0.125CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
YBa2Cu3O6+d Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	300	Pressure not reported	onset