TY - JOUR
T1 - Influence of optically quenched superconductivity on quasiparticle relaxation rates in Bi2Sr2CaCu2 O8+δ
AU - Smallwood, Christopher L.
AU - Zhang, Wentao
AU - Miller, Tristan L.
AU - Affeldt, Gregory
AU - Kurashima, Koshi
AU - Jozwiak, Chris
AU - Noji, Takashi
AU - Koike, Yoji
AU - Eisaki, Hiroshi
AU - Lee, Dung Hai
AU - Kaindl, Robert A.
AU - Lanzara, Alessandra
PY - 2015/10/6
Y1 - 2015/10/6
N2 - We use time- and angle-resolved photoemission to measure quasiparticle relaxation dynamics across a laser-induced superconducting phase transition in Bi2Sr2CaCu2O8+δ. Whereas low-fluence measurements reveal picosecond dynamics, sharp femtosecond dynamics emerge at higher fluence. Analyses of data as a function of energy, momentum, and doping indicate that the closure of the near-nodal gap and disruption of macroscopic coherence are primary mechanisms driving this onset. The results demonstrate the important influence of transient electronic structure on relaxation dynamics, which is relevant for developing an understanding of nonequilibrium phase transitions.
AB - We use time- and angle-resolved photoemission to measure quasiparticle relaxation dynamics across a laser-induced superconducting phase transition in Bi2Sr2CaCu2O8+δ. Whereas low-fluence measurements reveal picosecond dynamics, sharp femtosecond dynamics emerge at higher fluence. Analyses of data as a function of energy, momentum, and doping indicate that the closure of the near-nodal gap and disruption of macroscopic coherence are primary mechanisms driving this onset. The results demonstrate the important influence of transient electronic structure on relaxation dynamics, which is relevant for developing an understanding of nonequilibrium phase transitions.
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U2 - 10.1103/PhysRevB.92.161102
DO - 10.1103/PhysRevB.92.161102
M3 - Article
AN - SCOPUS:84944694826
VL - 92
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
SN - 0163-1829
IS - 16
M1 - 161102
ER -