Optical excitation of quasiparticle pairs in the vortex core of high-Tc superconductors
K. Karraï, E. J. Choi, F. Dunmore, S. H. Liu, H. D. Drew, Qi Li, D. B. Fenner, Y. D. Zhu, Fu-Chun Zhang
DOI 10.1103/PhysRevLett.69.152 · Physical Review Letters
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Abstract
A far-infrared resonance has been observed in superconducting YBa2Cu3O7 thin films in the presence of high magnetic fields. It corresponds to the quasiparticle pair creation process inside the vortex core. The resonance frequency is ω0=1.3kTc/ħ with a linewidth 1/τ≃0.6ω. This value for ω0 implies, within BCS theory, a large energy gap in YBa2Cu3O7.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 87 | Pressure not reported | zero_resistance |
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