Abstract
We carried out 139La-, 29Si- and 195Pt-NMR measurements of LaPt2Si2 which shows coexistence of a superconducting state and a charge density wave (CDW) state. Slight gradual decreasing ∼0.006% are observed in Knight shifts of 139La and 29Si-line C from 200K to 5K. The decreasing are much less than the previous 195Pt-NMR spectra PeakD’s shifts reported in T. Kubo et al, so the decreasing can be expected following 195Pt-Knight shift decreasing. LaPt2Si2 has two types of Pt-sites: Pt(1)2a(Wycoff position) and Pt(2)2c. By carrying out single crystalline 195Pt-NMR, the site assignments of 195Pt-NMR spectra to each respective Pt sites are succeeded for both H||a and ||c. Associating for 1/T1T results for polycrystalline powder reported by T. Kubo et al, Pt(1)-site may contributes to the CDW order below T*. It is necessary to measure the temperature dependences of line1’s 1/T1T by using single crystalline LaPt2Si2.
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