${}^{133}$Cs and ${}^{75}$As NMR investigation of the normal metallic state of the quasi-one-dimensional Cs${}_2$Cr${}_3$As${}_3$

Abstract

We report ${}^{133}$Cs NMR and ${}^{75}$As Nuclear Quadrupole Resonance (NQR) measurements on the normal metallic state above $T_c$ of a quasi-one-dimensional superconductor Cs${}_2$Cr${}_3$As${}_3$ ($T_c<1.6$~K). From the ${}^{133}$Cs NMR Knight shift ${}^{133}K$ measured at the Cs1 site, we show that the uniform spin susceptibility ${\chi }_{spin}$ increases from 295~K to $\sim$ 60~K, followed by a mild suppression; ${\chi }_{spin}$ then levels off below $\sim$10~K. In contrast, a vanishingly small magnitude of ${}^{133}K$ indicates that Cs2 sites contribute very little to electrical conduction and the exchange interactions between 3d electrons at Cr sites. Low frequency Cr spin dynamics, reflected on ${}^{75}$As $1/T_{1}T$ (the nuclear spin-lattice relaxation rate $1/T_1$ divided by temperature $T$), shows an analogous trend as ${\chi }_{spin}$. Comparison with the results of $1/T_{1}T$ near $T_c$ with Rb${}_2$Cr${}_3$As${}_3$ ($T_c=6.1$~K) and Rb${}_2$Cr${}_3$As${}_3$ ($T_c=4.8$~K) establishes a systematic trend that substitution of K${}^{+}$ ions with larger alkali ions progressively suppresses Cr spin fluctuations together with $T_c$.

Final accepted version with 11 Figures

References in corpus (11)

• Superconductivity in the vicinity of antiferromagnetic order in CrAs
• Superconductivity in quasi-one-dimensional K${}_2$Cr${}_3$As${}_3$ with significant electron correlations
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Cited by in corpus (15)

• Superconductivity at 5 K in quasi-one-dimensional Cr-based KCr3As3 single crystals
• Tuning the distance to a possible ferromagnetic quantum critical point in A2Cr3As3
• Superconductivity at 10.4 K in a novel quasi-one-dimensional ternary molybdenum pnictide K2Mo3As3
• Superconductivity at 7.3 K in the 133-type Cr-based RbCr3As3 single crystals
• Nodal superconducting gap structure in the quasi-one-dimensional Cs${}_2$Cr${}_3$As${}_3$ investigated using $\mu$SR measurements
• A brief review on muSR studies of unconventional Fe and Cr-based superconductors
• Peculiar properties of Cr${}_3$As${}_3$-chain-based superconductors
• Coupling of structure to magnetic and superconducting orders in quasi-one-dimensional ${\text{K}}_2{\text{Cr}}_3{\text{As}}_3$
• Coexistence of nontrivial topological properties and strong ferromagnetic fluctuations in $A_2$Cr${}_3$As${}_3$ ($A$=Na, K, Rb and Cs)
• Frustrated structural instability in superconducting quasi-one-dimensional K${}_2$Cr${}_3$As${}_3$
• Gapless spin-excitations in the superconducting state of a quasi-one-dimensional spin-triplet superconductor
• Tuning interchain ferromagnetic instability in A2Cr3As3 ternary arsenides by chemical pressure and uniaxial strain
• Superconductivity in the regime of attractive interactions in the Tomonaga-Luttinger liquid
• Magnetic correlations in the pressure-induced superconductor CrAs investigated by ${}^{75}$As nuclear magnetic resonance
• The pairing symmetry in quasi-one-dimensional superconductor Rb2Mo3As3