Journal
PHYSICAL REVIEW B
Volume 88, Issue 24, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.88.245132
Keywords
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Funding
- Berkeley Lab's program on Quantum Materials
- US Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division [DE-AC02-05CH11231]
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We use time- and angle-resolved photoemission to measure the nodal nonequilibrium electronic states in various dopings of Bi2Sr2CaCu2O8+delta. We find that the initial pump-induced transient signal of these ungapped states is strongly affected by the onset of the superconducting gap at T-c, superconducting pairing fluctuations at T-p, and the pseudogap at T*. Moreover, T-p marks a suggestive threshold in the fluence-dependent transient signal, with the appearance of a critical fluence below T-p that corresponds to the energy required to break apart all Cooper pairs. These results challenge the notion of a nodal-antinodal dichotomy in cuprate superconductors by establishing a link between nodal quasiparticles and the cuprate phase diagram.
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