Local tunneling spectroscopy of the electron-doped cuprate superconductor Sm1.85Ce0.15CuO4
A. Zimmers, Y. Noat, T. Cren, W. Sacks, D. Roditchev, B. Liang, R. L. Greene
DOI 10.1103/PhysRevB.76.132505 · Physical Review B
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Abstract
We present local tunneling spectroscopy in the optimally electron-doped cuprate Sm2−xCexCuO4, x=0.15. A clear signature of the superconducting gap is observed with an amplitude ranging from place to place and from sample to sample (Δ∼3.5–6meV). Another spectroscopic feature is simultaneously observed at high energy with an amplitude ranging from ±60 to ±80meV. Its energy scale and temperature evolution are found to be compatible with previous photoemission and optical experiments. If interpreted as the signature of antiferromagnetic order in the samples, these results could suggest the coexistence on the local scale of antiferromagnetism and superconductivity on the electron-doped side of cuprate superconductors.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Sm1.85Ce0.15CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 20 | Pressure not reported | onset |
| Sm1.85Ce0.15CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 17.5 | Pressure not reported | onset |
| Sm1.85Ce0.15CuO4 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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