Observation of Competing Order in a High-$T_{c}$ Superconductor with Femtosecond Optical Pulses

Details Observation of Competing Order in a High-$T_{c}$ Superconductor with Femtosecond Optical Pulses Observation of Competing Order in a High-$T_{c}$ Superconductor with Femtosecond Optical Pulses

2007-05-11

arxiv.org/abs/0705.1724v1

Phys. Rev. Lett. 99, 147008 (2007)

Physics

Condensed Matter

Superconductivity

5 pages, 3 figures

Scientific paper

We present studies of the photoexcited quasiparticle dynamics in Tl$_{2}$Ba$_{2}$Ca$_{2}$Cu$_{3}$O$_{y}$ (Tl-2223) using femtosecond optical techniques. Deep into the superconducting state (below 40 K), a dramatic change occurs in the temporal dynamics associated with photoexcited quasiparticles rejoining the condensate. This is suggestive of entry into a coexistence phase which, as our analysis reveals, opens a gap in the density of states (in addition to the superconducting gap), and furthermore, competes with superconductivity resulting in a depression of the superconducting gap.

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