Signatures of Enhanced Superconducting Phase Coherence in Optimally Doped Bi2Sr2Y0.08Ca0.92Cu2O8+δ Driven by Midinfrared Pulse Excitations
- Univ. degli Studi di Trieste (Italy); Elettra Sincrotrone Trieste S.C.p.A.(Italy)
- Univ. of British Columbia, Vancouver, BC (Canada)
- National Inst. of Advanced Industrial Science and Technology, Ibaraki (Japan)
- Univ. of Minnesota, Minneapolis, MN (United States)
- Univ. degli Studi di Salerno, Fisciano (Italy); CNR-SPIN, Fisciano (Italy)
- 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
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
Physics
Impurities in superconductors
Optical transient phenomena
Pseudogap
Superconducting fluctuations
Superconducting phase transition
Ultrafast phenomena
Cuprates
High-temperature superconductors
Infrared spectroscopy
Optical absorption spectroscopy