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arXiv · 0705.1724

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

Elbert E. M. Chia·Jian-Xin Zhu·D. Talbayev·R. D. Averitt·Kyu-Hwan Oh·In-Sun Jo·S. -I. Lee·A. J. Taylor
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Abstract

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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Elbert E. M. Chia, Jian-Xin Zhu, D. Talbayev, R. D. Averitt, Kyu-Hwan Oh, In-Sun Jo, S. -I. Lee, A. J. Taylor. 2007-05-11. Observation of Competing Order in a High-$T_{c}$ Superconductor with Femtosecond Optical Pulses. https://doi.org/10.1103/physrevlett.99.147008

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