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 |
ASJC Scopus subject areas
- Physics and Astronomy(all)
Fingerprint Dive into the research topics of 'Ferromagnetic Spin Fluctuation and Unconventional Superconductivity in Rb2Cr3As3 Revealed by As 75 NMR and NQR'. Together they form a unique fingerprint.
Cite this
Yang, J., Tang, Z. T., Cao, G. H., & Zheng, G. Q. (2015). Ferromagnetic Spin Fluctuation and Unconventional Superconductivity in Rb2Cr3As3 Revealed by As 75 NMR and NQR. Physical Review Letters, 115(14), [147002]. https://doi.org/10.1103/PhysRevLett.115.147002