Proposed Parametric Cooling of Bilayer Cuprate Superconductors by Terahertz 
Excitation

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

doi:10.1103/PhysRevLett.114.137001

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Journal Article

Proposed Parametric Cooling of Bilayer Cuprate Superconductors by Terahertz Excitation

MPS-Authors

Clark, S. R.
Clarendon Laboratory, University of Oxford;
Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;

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Laplace, Y.
Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;

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Cavalleri, A.
Clarendon Laboratory, University of Oxford;
Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;

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http://dx.doi.org/10.1103/PhysRevLett.114.137001
(Publisher version)

http://arxiv.org/abs/1411.3258
(Preprint)

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1411.3258.pdf
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Citation

Denny, S. J., Clark, S. R., Laplace, Y., Cavalleri, A., & Jaksch, D. (2015). Proposed Parametric Cooling of Bilayer Cuprate Superconductors by Terahertz Excitation. Physical Review Letters, 114(13): 137001. doi:10.1103/PhysRevLett.114.137001.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0026-B0DB-3

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 T_c, provided a finite pair density survives between the bilayers out of equilibrium.