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  Theory of Enhanced Interlayer Tunneling in Optically Driven High-Tc Superconductors

Okamoto, J.-i., Cavalleri, A., & Mathey, L. (2016). Theory of Enhanced Interlayer Tunneling in Optically Driven High-Tc Superconductors. Physical Review Letters, 117(22): 227001. doi:10.1103/PhysRevLett.117.227001.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-FD42-D Version Permalink: http://hdl.handle.net/21.11116/0000-0004-8FB9-B
Genre: Journal Article

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PhysRevLett.117.227001.pdf (Publisher version), 360KB
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https://arxiv.org/abs/1606.09276 (Preprint)
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https://doi.org/10.1103/PhysRevLett.117.227001 (Publisher version)
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 Creators:
Okamoto, Jun-ichi1, 2, Author
Cavalleri, Andrea3, 4, Author              
Mathey, Ludwig1, 2, Author
Affiliations:
1Zentrum für Optische Quantentechnologien and Institut für Laserphysik, Universität Hamburg, 22761 Hamburg, Germany, ou_persistent22              
2The Hamburg Centre for Ultrafast Imaging, Luruper Chaussee 149, 22761 Hamburg, Germany, ou_persistent22              
3Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938293              
4Department of Physics, Clarendon Laboratory, University of Oxford, ou_persistent22              

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Free keywords: Condensed Matter; Superconductivity
 Abstract: Motivated by recent pump-probe experiments indicating enhanced coherent c-axis transport in underdoped YBCO, we study Josephson junctions periodically driven by optical pulses. We propose a mechanism for this observation by demonstrating that a parametrically driven Josephson junction shows an enhanced imaginary part of the low-frequency conductivity when the driving frequency is above the plasma frequency, implying an effectively enhanced Josephson coupling. We generalize this analysis to a bilayer system of Josephson junctions modeling YBCO. Again, the Josephson coupling is enhanced when the pump frequency is blue detuned to either of the two plasma frequencies of the material. We show that the emergent driven state is a genuine, nonequilibrium superconducting state, in which equilibrium relations between the Josephson coupling, current fluctuations, and the critical current no longer hold.

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Language(s): eng - English
 Dates: 2016-06-292016-06-292016-11-222016-11-25
 Publication Status: Published in print
 Pages: 6
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: arXiv: 1606.09276
DOI: 10.1103/PhysRevLett.117.227001
 Degree: -

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Title: Physical Review Letters
  Abbreviation : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: - Volume / Issue: 117 (22) Sequence Number: 227001 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: /journals/resource/954925433406_1