Signatures of Enhanced Superconducting Phase Coherence in Optimally Doped Bi2Sr2 Y0.08Ca0.92Cu2 O8+δ Driven by Midinfrared Pulse Excitations

F. Giusti, A. Marciniak, F. Randi, G. Sparapassi, F. Boschini, H. Eisaki, M. Greven, A. Damascelli, A. Avella, D. Fausti

Research output: Contribution to journalArticle

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Abstract

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. 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.

Original languageEnglish (US)
Article number067002
JournalPhysical Review Letters
Volume122
Issue number6
DOIs
StatePublished - Feb 15 2019

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phase coherence
signatures
pulses
excitation
copper
photoexcitation
cuprates
condensates
critical temperature
superconductivity
transition temperature
disorders
photons
temperature
energy

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Signatures of Enhanced Superconducting Phase Coherence in Optimally Doped Bi2Sr2 Y0.08Ca0.92Cu2 O8+δ Driven by Midinfrared Pulse Excitations. / Giusti, F.; Marciniak, A.; Randi, F.; Sparapassi, G.; Boschini, F.; Eisaki, H.; Greven, M.; Damascelli, A.; Avella, A.; Fausti, D.

In: Physical Review Letters, Vol. 122, No. 6, 067002, 15.02.2019.

Research output: Contribution to journalArticle

Giusti, F, Marciniak, A, Randi, F, Sparapassi, G, Boschini, F, Eisaki, H, Greven, M, Damascelli, A, Avella, A & Fausti, D 2019, 'Signatures of Enhanced Superconducting Phase Coherence in Optimally Doped Bi2Sr2 Y0.08Ca0.92Cu2 O8+δ Driven by Midinfrared Pulse Excitations', Physical Review Letters, vol. 122, no. 6, 067002. https://doi.org/10.1103/PhysRevLett.122.067002
Giusti, F. ; Marciniak, A. ; Randi, F. ; Sparapassi, G. ; Boschini, F. ; Eisaki, H. ; Greven, M. ; Damascelli, A. ; Avella, A. ; Fausti, D. / Signatures of Enhanced Superconducting Phase Coherence in Optimally Doped Bi2Sr2 Y0.08Ca0.92Cu2 O8+δ Driven by Midinfrared Pulse Excitations. In: Physical Review Letters. 2019 ; Vol. 122, No. 6.
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