Evolution of a bosonic mode across the superconducting dome in the high-Tc cuprate Pr2−xCexCuO4−δ
I. Diamant, S. Hacohen-Gourgy, Y. Dagan
DOI 10.1103/PhysRevB.84.104511 · Physical Review B
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Abstract
We report a detailed spectroscopic study of the electron-doped cuprate superconductor Pr2−xCexCuO4−δ using point contact junctions for x=0.125 (underdoped), x=0.15 (optimally doped), and x=0.17 (overdoped). From our conductance measurements, we are able to identify bosonic resonances for each doping. These excitations disappear above the critical magnetic field. We find that the energy of the bosonic excitations decreases with doping, which excludes lattice vibrations as the paring glue. We conclude that the bosonic mediator for these cuprates is more likely to be spin excitations.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Pr2-xCexCuO4-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 10.5 | Pressure not reported | unknown |
| Pr2-xCexCuO4-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 16.3 | Pressure not reported | unknown |
| Pr2-xCexCuO4-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 12.5 | Pressure not reported | unknown |
| Pr0.88LaCe0.12CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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