Photoinduced filling of near nodal gap in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$

Abstract

We report time and angle resolved spectroscopic measurements in optimally doped Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$. The spectral function is monitored as a function of temperature, photoexcitation density and delay time from the pump pulse. According to our data, the superconducting gap becomes slightly stiffer when moving off the nodal direction. The nodal quasiparticles develop a faster dynamics when pumping the superconductor with a fluence that is large enough to induce the total collapse of the gap. We discuss the observed relaxation in terms of a dynamical reformation of Cooper pairs.

arXiv comment6 pages, 7 figures

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Cited by in corpus (6)

• Time- and Angle-Resolved Photoemission Studies of Quantum Materials
• Collapse of superconductivity in cuprates via ultrafast quenching of phase coherence
• Near-infrared light-induced superconducting-like state in underdoped YBa${}_2$Cu${}_3$O${}_y$ studied by $c$-axis terahertz third-harmonic generation
• Time-resolved ARPES on cuprates: Tracking the low-energy electrodynamics in the time domain
• Interplay of superconductivity and bosonic coupling in the peak-dip-hump structure of Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$
• Ultrafast Raman probe of the photoinduced superconducting to normal state transition in the cuprate Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$