Proposed parametric cooling of bilayer cuprate superconductors by terahertz excitation

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 betwee...

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Bibliographic Details
Published in:Physical review letters 2015-04, Vol.114 (13), p.137001-137001, Article 137001
Main Authors: Denny, S J, Clark, S R, Laplace, Y, Cavalleri, A, Jaksch, D
Format: Article
Language:English
Subjects:
Cooling
Cuprates
Density
Mathematical analysis
Modulation
Plasmons
Superconductivity
Vibration
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Summary: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.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.114.137001