Doping-Dependent Photon Scattering Resonance in the Model High-Temperature Superconductor HgBa2CuO4+δ Revealed by Raman Scattering and Optical Ellipsometry
Yuan Li, M. Le Tacon, Y. Matiks, A. V. Boris, T. Loew, C. T. Lin, Lu Chen, M. K. Chan, C. Dorow, L. Ji, N. Barišić, X. Zhao, M. Greven, B. Keimer
DOI 10.1103/PhysRevLett.111.187001 · Physical Review Letters
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Abstract
We study the model high-temperature superconductor HgBa2CuO4+δ with electronic Raman scattering and optical ellipsometry over a wide doping range. The dependence of the resonant Raman cross section on the incident photon energy changes drastically as a function of doping, in a manner that corresponds to a rearrangement of the interband optical transitions seen with ellipsometry. This doping-dependent Raman resonance allows us to reconcile the apparent discrepancy between Raman and x-ray detection of magnetic fluctuations in superconducting cuprates. Intriguingly, the strongest variation occurs across the doping level where the antinodal superconducting gap appears to reach its maximum.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| HgBa2CuO4+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 45 | Pressure not reported | unknown |
| HgBa2CuO4+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 64 | Pressure not reported | unknown |
| HgBa2CuO4+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 94 | Pressure not reported | unknown |
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