Evidence of s-wave pairing symmetry in the layered superconductor Li0.68NbO2 from specific heat measurements
G. T. Liu, J. L. Luo, Z. Li, Y. Q. Guo, N. L. Wang, D. Jin, T. Xiang
DOI 10.1103/PhysRevB.74.012504 · Physical Review B
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Abstract
A high quality superconducting Li0.68NbO2 polycrystalline sample was prepared by deintercalation of Li ions from Li0.93NbO2. The field-dependent resistivity and specific heat were measured down to 0.5K. The temperature dependence of the upper critical field is determined. A notable specific-heat jump is observed at the superconducting transition temperature Tc∼5.0K at zero field. Below Tc, the electronic specific heat shows a thermal activated behavior and agrees well with the theoretical result for the BCS s-wave superconductor. It indicates that the superconducting pairing in Li0.68NbO2 has s-wave symmetry.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Li0.68NbO2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5.5 | Pressure not reported | onset |
| Li0.68NbO2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.8 | Pressure not reported | zero_resistance |
| Li0.68NbO2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5 | Pressure not reported | midpoint |
| Na0.3CoO2*1.3H2O Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.8 | Pressure not reported | unknown |
| LixNbO2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5.5 | Pressure not reported | unknown |
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