Abstract
The relationship between charge-density wave (CDW) orders and superconductivity in arsenide superconductor SrPt2As2 with Tc=5.2K which crystallizes in the CaBe2Ge2-type structure was studied by 75As nuclear magnetic resonance (NMR) measurements up to 520 K, and 75As nuclear quadrupole resonance (NQR) and Pt195-NMR measurements down to 1.5 K. At high temperature, As75-NMR spectrum and nuclear-spin-relaxation rate (1/T1) have revealed two distinct CDW orders, one realized in the As-Pt-As layer below TCDWAs(1)=410K and the other in the Pt-As-Pt layer below TCDWAs(2)=255K. The 1/T1 measured by As75-NQR shows a clear Hebel-Slichter peak just below Tc and decreases exponentially well below Tc. Concomitantly, Pt195 Knight shift decreases below Tc. Our results indicate that superconductivity in SrPt2As2 is in the spin-singlet state with an s-wave gap and is robust under the two distinct CDW orders in different layers.
| Original language | English |
|---|---|
| Article number | 060510 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 91 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - Feb 27 2015 |
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ASJC Scopus subject areas
- Condensed Matter Physics
- Electronic, Optical and Magnetic Materials
Cite this
Coexistence of multiple charge-density waves and superconductivity in SrPt2As2 revealed by As 75 -NMR/NQR and Pt 195 -NMR. / Kawasaki, Shinji; Tani, Yoshihiko; Mabuchi, Tomosuke; Kudo, Kazutaka; Nishikubo, Yoshihiro; Mitsuoka, Daisuke; Nohara, Minoru; Zheng, Guo-Qing.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 91, No. 6, 060510, 27.02.2015.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Coexistence of multiple charge-density waves and superconductivity in SrPt2As2 revealed by As 75 -NMR/NQR and Pt 195 -NMR
AU - Kawasaki, Shinji
AU - Tani, Yoshihiko
AU - Mabuchi, Tomosuke
AU - Kudo, Kazutaka
AU - Nishikubo, Yoshihiro
AU - Mitsuoka, Daisuke
AU - Nohara, Minoru
AU - Zheng, Guo-Qing
PY - 2015/2/27
Y1 - 2015/2/27
N2 - The relationship between charge-density wave (CDW) orders and superconductivity in arsenide superconductor SrPt2As2 with Tc=5.2K which crystallizes in the CaBe2Ge2-type structure was studied by 75As nuclear magnetic resonance (NMR) measurements up to 520 K, and 75As nuclear quadrupole resonance (NQR) and Pt195-NMR measurements down to 1.5 K. At high temperature, As75-NMR spectrum and nuclear-spin-relaxation rate (1/T1) have revealed two distinct CDW orders, one realized in the As-Pt-As layer below TCDWAs(1)=410K and the other in the Pt-As-Pt layer below TCDWAs(2)=255K. The 1/T1 measured by As75-NQR shows a clear Hebel-Slichter peak just below Tc and decreases exponentially well below Tc. Concomitantly, Pt195 Knight shift decreases below Tc. Our results indicate that superconductivity in SrPt2As2 is in the spin-singlet state with an s-wave gap and is robust under the two distinct CDW orders in different layers.
AB - The relationship between charge-density wave (CDW) orders and superconductivity in arsenide superconductor SrPt2As2 with Tc=5.2K which crystallizes in the CaBe2Ge2-type structure was studied by 75As nuclear magnetic resonance (NMR) measurements up to 520 K, and 75As nuclear quadrupole resonance (NQR) and Pt195-NMR measurements down to 1.5 K. At high temperature, As75-NMR spectrum and nuclear-spin-relaxation rate (1/T1) have revealed two distinct CDW orders, one realized in the As-Pt-As layer below TCDWAs(1)=410K and the other in the Pt-As-Pt layer below TCDWAs(2)=255K. The 1/T1 measured by As75-NQR shows a clear Hebel-Slichter peak just below Tc and decreases exponentially well below Tc. Concomitantly, Pt195 Knight shift decreases below Tc. Our results indicate that superconductivity in SrPt2As2 is in the spin-singlet state with an s-wave gap and is robust under the two distinct CDW orders in different layers.
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U2 - 10.1103/PhysRevB.91.060510
DO - 10.1103/PhysRevB.91.060510
M3 - Article
AN - SCOPUS:84924034170
VL - 91
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 6
M1 - 060510
ER -