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 (2019)


Publication Type: Journal article

Publication year: 2019

Journal

Book Volume: 122

Article Number: 067002

Journal Issue: 6

DOI: 10.1103/PhysRevLett.122.067002

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.

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APA:

Giusti, F., Marciniak, A., Randi, F., Sparapassi, G., Boschini, F., Eisaki, H.,... 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, 122(6). https://doi.org/10.1103/PhysRevLett.122.067002

MLA:

Giusti, Francesca, et al. "Signatures of Enhanced Superconducting Phase Coherence in Optimally Doped Bi2Sr2 Y0.08Ca0.92Cu2 O8+δ Driven by Midinfrared Pulse Excitations." Physical Review Letters 122.6 (2019).

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