NMR studies of coexistence of superconductivity and CDW in LaPt2Si2

Taisuke Aoyama, Tetsuro Kubo, Haruki Matsuno, Hisashi Kotegawa, Hideki Tou, Akihiro Mitsuda, Yutaro Nagano, Nobutaka Araoka, Hirohumi Wada, Yuh Yamada

Research output: Contribution to journalConference article

3 Citations (Scopus)

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.

Original languageEnglish
Article number062002
JournalJournal of Physics: Conference Series
Volume807
Issue number6
DOIs
Publication statusPublished - Apr 6 2017
Event18th International Conference on Strongly Correlated Electron Systems, SCES 2016 - Hangzhou, China
Duration: May 9 2016May 13 2016

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superconductivity
nuclear magnetic resonance
temperature dependence
shift

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

NMR studies of coexistence of superconductivity and CDW in LaPt2Si2. / Aoyama, Taisuke; Kubo, Tetsuro; Matsuno, Haruki; Kotegawa, Hisashi; Tou, Hideki; Mitsuda, Akihiro; Nagano, Yutaro; Araoka, Nobutaka; Wada, Hirohumi; Yamada, Yuh.

In: Journal of Physics: Conference Series, Vol. 807, No. 6, 062002, 06.04.2017.

Research output: Contribution to journalConference article

Aoyama, T, Kubo, T, Matsuno, H, Kotegawa, H, Tou, H, Mitsuda, A, Nagano, Y, Araoka, N, Wada, H & Yamada, Y 2017, 'NMR studies of coexistence of superconductivity and CDW in LaPt2Si2', Journal of Physics: Conference Series, vol. 807, no. 6, 062002. https://doi.org/10.1088/1742-6596/807/6/062002
Aoyama, Taisuke ; Kubo, Tetsuro ; Matsuno, Haruki ; Kotegawa, Hisashi ; Tou, Hideki ; Mitsuda, Akihiro ; Nagano, Yutaro ; Araoka, Nobutaka ; Wada, Hirohumi ; Yamada, Yuh. / NMR studies of coexistence of superconductivity and CDW in LaPt2Si2. In: Journal of Physics: Conference Series. 2017 ; Vol. 807, No. 6.
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AU - Aoyama, Taisuke

AU - Kubo, Tetsuro

AU - Matsuno, Haruki

AU - Kotegawa, Hisashi

AU - Tou, Hideki

AU - Mitsuda, Akihiro

AU - Nagano, Yutaro

AU - Araoka, Nobutaka

AU - Wada, Hirohumi

AU - Yamada, Yuh

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N2 - 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.

AB - 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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