Abstract
We report As75 nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR) studies on the superconductor Rb2Cr3As3 with a quasi-one-dimensional crystal structure. Below T∼100K, the spin-lattice relaxation rate (1/T1) divided by temperature, 1/T1T, increases upon cooling down to Tc=4.8K, showing a Curie-Weiss-like temperature dependence. The Knight shift also increases with decreasing temperature. These results suggest ferromagnetic spin fluctuation. In the superconducting state, 1/T1 decreases rapidly below Tc without a Hebel-Slichter peak, and follows a T5 variation below T∼3K, which points to unconventional superconductivity with point nodes in the gap function.
| Original language | English |
|---|---|
| Article number | 147002 |
| Journal | Physical Review Letters |
| Volume | 115 |
| Issue number | 14 |
| DOIs | |
| Publication status | Published - Sep 29 2015 |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
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Ferromagnetic Spin Fluctuation and Unconventional Superconductivity in Rb2Cr3As3 Revealed by As 75 NMR and NQR. / Yang, J.; Tang, Z. T.; Cao, G. H.; Zheng, Guo-Qing.
In: Physical Review Letters, Vol. 115, No. 14, 147002, 29.09.2015.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Ferromagnetic Spin Fluctuation and Unconventional Superconductivity in Rb2Cr3As3 Revealed by As 75 NMR and NQR
AU - Yang, J.
AU - Tang, Z. T.
AU - Cao, G. H.
AU - Zheng, Guo-Qing
PY - 2015/9/29
Y1 - 2015/9/29
N2 - We report As75 nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR) studies on the superconductor Rb2Cr3As3 with a quasi-one-dimensional crystal structure. Below T∼100K, the spin-lattice relaxation rate (1/T1) divided by temperature, 1/T1T, increases upon cooling down to Tc=4.8K, showing a Curie-Weiss-like temperature dependence. The Knight shift also increases with decreasing temperature. These results suggest ferromagnetic spin fluctuation. In the superconducting state, 1/T1 decreases rapidly below Tc without a Hebel-Slichter peak, and follows a T5 variation below T∼3K, which points to unconventional superconductivity with point nodes in the gap function.
AB - We report As75 nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR) studies on the superconductor Rb2Cr3As3 with a quasi-one-dimensional crystal structure. Below T∼100K, the spin-lattice relaxation rate (1/T1) divided by temperature, 1/T1T, increases upon cooling down to Tc=4.8K, showing a Curie-Weiss-like temperature dependence. The Knight shift also increases with decreasing temperature. These results suggest ferromagnetic spin fluctuation. In the superconducting state, 1/T1 decreases rapidly below Tc without a Hebel-Slichter peak, and follows a T5 variation below T∼3K, which points to unconventional superconductivity with point nodes in the gap function.
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U2 - 10.1103/PhysRevLett.115.147002
DO - 10.1103/PhysRevLett.115.147002
M3 - Article
VL - 115
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 14
M1 - 147002
ER -