Nodeless superconductivity in the charge density wave superconductor LaPt2Si2
Z. Y. Nie, L. C. Yin, A. Thamizhavel, A. Wang, B. Shen, L. Q. Che, F. Du, Z. Hossain, M. Smidman, X. Lu, H. Q. Yuan
DOI 10.1103/PhysRevB.103.014515 · Physical Review B
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Abstract
We have studied the superconducting gap structure of LaPt2Si2 by measuring the temperature dependence of the London penetration depth shift Δλ(T) and point contact spectroscopy of single crystals. Δλ(T) shows an exponential temperature dependence at low temperatures, and the derived normalized superfluid density ρs(T) can be well described by a single-gap s-wave model. The point-contact conductance spectra can also be well fitted by an s-wave Blonder-Tinkham-Klapwijk model, where the gap value shows a typical BCS temperature and magnetic field dependence consistent with type-II superconductivity. These results suggest fully gapped superconductivity in LaPt2Si2, with moderately strong electron-phonon coupling.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| LaPt2Si2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.1 | Pressure not reported | onset |
| LaPt2Si2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.8 | Pressure not reported | zero_resistance |
| LaPt2Si2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.8 | Pressure not reported | midpoint |
| LaPt2Si2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.9 | Pressure not reported | unknown |
| SrPt2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5.2 | Pressure not reported | unknown |
| BaPt2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.33 | Pressure not reported | unknown |
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