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  Redistribution of phase fluctuations in a periodically driven cuprate superconductor

Höppner, R., Zhu, B., Rexin, T., Cavalleri, A., & Mathey, L. (2015). Redistribution of phase fluctuations in a periodically driven cuprate superconductor. Physical Review B, 91(10): 104507. doi:10.1103/PhysRevB.91.104507.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0025-776B-3 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0028-2CE8-8
Genre: Journal Article

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PhysRevB.91.104507.pdf (Publisher version), 4MB
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PhysRevB.91.104507.pdf
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http://dx.doi.org/10.1103/PhysRevB.91.104507 (Publisher version)
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http://arxiv.org/abs/1406.3609 (Preprint)
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 Creators:
Höppner, R.1, Author
Zhu, B.1, Author
Rexin, T.1, Author
Cavalleri, Andrea2, 3, Author              
Mathey, L.1, 4, Author
Affiliations:
1Zentrum für Optische Quantentechnologien and Institut für Laserphysik, Universität Hamburg, 22761 Hamburg, Germany, ou_persistent22              
2Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938293              
3Department of Physics, Oxford University, Clarendon Laboratory, Parks Road, Oxford, United Kingdom, ou_persistent22              
4 The Hamburg Centre for Ultrafast Imaging, Luruper Chaussee 149, Hamburg 22761, Germany, ou_persistent22              

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Free keywords: PACS numbers: 74.25.−q, 74.40.Gh, 74.72.−h, 74.81.Fa
 Abstract: We study the thermally fluctuating state of a bilayer cuprate superconductor under the periodic action of a staggered field oscillating at optical frequencies. This analysis distills essential elements of the recently discovered phenomenon of light-enhanced coherence in YBa2Cu3O6+x, which was achieved by periodically driving infrared active apical oxygen distortions. The effect of a staggered periodic perturbation is studied using a Langevin and Fokker-Planck description of driven, coupled Josephson junctions, which represent two neighboring pairs of layers and their two plasmons. In a toy model including only two junctions, we demonstrate that the external driving leads to a suppression of phase fluctuations of the low-energy plasmon, an effect which is amplified via the resonance of the high-energy plasmon. When extending the modeling to the full layers, we find that this reduction becomes far more pronounced, with a striking suppression of the low-energy fluctuations, as visible in the power spectrum. We also find that this effect acts on the in-plane fluctuations, which are reduced on long length scales. All these findings provide a physical framework to describe light control in cuprates.

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Language(s): eng - English
 Dates: 2015-01-212014-11-222015-03-112015-03-01
 Publication Status: Published in print
 Pages: 12
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1103/PhysRevB.91.104507
BibTex Citekey: PhysRevB.91.104507
arXiv: 1406.3609
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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 91 (10) Sequence Number: 104507 Start / End Page: - Identifier: ISSN: 1098-0121
CoNE: /journals/resource/954925225008