Nodeless superconductivity in the charge density wave superconductor <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>LaPt</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>Si</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>
نویسندگان
چکیده
We have studied the superconducting gap structure of LaPt$_2$Si$_2$ by measuring temperature dependence London penetration depth shift $\Delta\lambda(T)$ and point contact spectroscopy single crystals. shows an exponential at low temperatures, derived normalized superfluid density $\rho_{s}(T)$ can be well described a single-gap s-wave model. The point-contact conductance spectra also fitted Blonder-Tinkham-Klapwijk model, where value typical BCS magnetic field consistent with type-II superconductivity. These results suggest fully gapped superconductivity in LaPt$_2$Si$_2$, moderately strong electron-phonon coupling.
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ژورنال
عنوان ژورنال: Physical review
سال: 2021
ISSN: ['0556-2813', '1538-4497', '1089-490X']
DOI: https://doi.org/10.1103/physrevb.103.014515