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Nodal Superconducting Gap Structure in the Quasi-One-Dimensional Cs<sub>2</sub>Cr<sub>3</sub>As<sub>3</sub> Investigated Using μSR Measurements
The superconducting ground state of the newly discovered superconductor Cs$_2$Cr$_3$As$_3$ with a quasi-one-dimensional crystal structure ($T_{\bf c}\sim$ 2.1(1) K) has been investigated using magnetization and muon-spin relaxation or rotation ($\mu$SR), both zero-field (ZF) and transverse-field (TF), measurements. Our ZF $\mu$SR measurements reveal the presence of spin fluctuations below 4 K …