Weak-coupling Bardeen-Cooper-Schrieffer superconductivity in the electron-doped cuprate superconductors
L. Shan, Y. Huang, Y. L. Wang, Shiliang Li, Jun Zhao, Pengcheng Dai, Y. Z. Zhang, C. Ren, H. H. Wen
DOI 10.1103/PhysRevB.77.014526 · Physical Review B
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Abstract
We use in-plane tunneling spectroscopy to study the temperature dependence of the local superconducting gap Δ(T) in electron-doped copper oxides with various Tc’s and Ce-doping concentrations. We show that the temperature dependence of Δ(T) follows the expectation of the Bardeen-Cooper-Schrieffer (BCS) theory of superconductivity, where Δ(0)∕kBTc≈1.72±0.15 and Δ(0) is the average superconducting gap across the Fermi surface, for all the doping levels investigated. These results suggest that the electron-doped superconducting copper oxides are weak-coupling BCS superconductors.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Pr0.88LaCe0.12CuO4-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 21 | Pressure not reported | unknown |
| Pr0.88LaCe0.12CuO4-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 24 | Pressure not reported | unknown |
| Nd1.85Ce0.15CuO4-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 25 | Pressure not reported | unknown |
| Pr0.85LaCe0.15CuO4-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 17 | Pressure not reported | unknown |
| Pr0.85LaCe0.15CuO4-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 13 | Pressure not reported | unknown |
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