Observation of Competing Order in a High-Tc Superconductor Using Femtosecond Optical Pulses
Elbert E. M. Chia, Jian-Xin Zhu, D. Talbayev, R. D. Averitt, A. J. Taylor, Kyu-Hwan Oh, In-Sun Jo, S.-I. Lee
DOI 10.1103/PhysRevLett.99.147008 · Physical Review Letters
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Abstract
We present studies of the photoexcited quasiparticle dynamics in Tl2Ba2Ca2Cu3Oy (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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Tl2Ba2Ca2Cu3Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 115 | Pressure not reported | unknown |
| Tl2Ba2Ca2Cu3Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 117 | Pressure not reported | unknown |
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