NMR studies of coexistence of superconductivity and CDW in LaPt₂Si₂

Multigap superconductivity in the charge density wave superconductor LaPt2Si2

“…Hence, observation of two gaps in LaPt 2 Si 2 is quite remarkable among the existing members of CaBe 2 Ge 2 -type structure exhibiting coexistence of CDW and superconductivity. However, recent reports discussing NMR studies 40,51 on LaPt 2 Si 2 are limited down to 5 K. So, NMR investigations probing the superconducting state in LaPt 2 Si 2 will be worthwhile. Now, considering London theory 52 λ L (0) can be related to the effective quasi-particle mass (m * ) and the superfluid density (n s ) by the relation λ L (0) = m * c 2 /4πn s e 2 where m * = (1+ λ el−ph )m e .…”