Abstract
We study the model high-temperature superconductor HgBa2CuO 4+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.
Original language | English (US) |
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Article number | 187001 |
Journal | Physical review letters |
Volume | 111 |
Issue number | 18 |
DOIs | |
State | Published - Oct 30 2013 |