Quasiparticle excitations in the superconducting state observed in light scattering
D. Mihailović, M. Zgonik, M. Čopič, M. Hrovat
DOI 10.1103/PhysRevB.36.3997 · Physical Review B
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Abstract
In light scattering experiments on superconducting Y-Ba-Cu-O ceramic oxides we observe an unexpectedly intense Stokes-shifted spectrum from about 100 cm−1 (≈ 13 meV) to 4000 cm−1 (≈0.5 eV). We propose that this is due to light scattered from energy-density fluctuations of quasiparticle states excited above the superconducting ground state. The temperature dependence of the scattering intensity shows strong hysteresis, not observed in other experiments on the oxide superconductors.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure not reported | unknown |
| La1.85Sr0.15CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 38 | Pressure not reported | unknown |
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