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Title: Signatures of Enhanced Superconducting Phase Coherence in Optimally Doped Bi2Sr2Y0.08Ca0.92Cu2O8+δ Driven by Midinfrared Pulse Excitations

Journal Article · · Physical Review Letters
 [1];  [1];  [1];  [1];  [2];  [3];  [4];  [2];  [5];  [6]
  1. Univ. degli Studi di Trieste (Italy); Elettra Sincrotrone Trieste S.C.p.A.(Italy)
  2. Univ. of British Columbia, Vancouver, BC (Canada)
  3. National Inst. of Advanced Industrial Science and Technology, Ibaraki (Japan)
  4. Univ. of Minnesota, Minneapolis, MN (United States)
  5. Univ. degli Studi di Salerno, Fisciano (Italy); CNR-SPIN, Fisciano (Italy)
  6. Univ. degli Studi di Trieste (Italy); Elettra Sincrotrone Trieste S.C.p.A.(Italy); Princeton Univ., NJ (United States)

Optimally doped cuprate are characterized by the presence of superconducting fluctuations in a relatively large temperature region above the critical transition temperature. We reveal here that the effect of thermal disorder, which decreases the condensate phase coherence at equilibrium, can be dynamically contrasted by photoexcitation with ultrashort midinfrared pulses. In particular, our findings reveal that light pulses with photon energy comparable to the amplitude of the superconducting gap and polarized in plane along the copper-copper direction can dynamically enhance the optical response associated with the onset of superconductivity. Furthermore, we propose that this effect can be rationalized by an effective d-wave BCS model, which reveals that midinfrared pulses result in a transient increase of the phase coherence.

Research Organization:
Univ. of Minnesota, Minneapolis, MN (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0016371
OSTI ID:
1612518
Journal Information:
Physical Review Letters, Vol. 122, Issue 6; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 16 works
Citation information provided by
Web of Science

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Cited By (5)

Angle-resolved photoemission spectroscopy and its application to topological materials journal August 2019
Nature of the superconducting fluctuations in photoexcited systems journal September 2019
Multiple band crossings and Fermi surface topology: Role of double nonsymmorphic symmetries in MnP-type crystal structures journal September 2019
Nature of superconducting fluctuation in photo-excited systems text January 2019
Angle-resolved photoemission spectroscopy and its application to topological materials text January 2021