Upper critical field beyond Pauli limit in the exfoliated RbCr3As3 nanowires

Abstract

Abstract Unconventional superconductivity in the quasi-two-dimensional cuprates and iron-based superconductors has attracted great attention in these years. Recently, the discovery of the Cr-based ternary compounds has aroused the research upsurge for the possible spin-triplet superconductivity revealed from the bulk samples. Here we carried out the electrical transport measurements of the air-stable RbCr3As3 after the dimensionality reduction. It is founded that the superconductivity is suppressed, while the upper critical field is still far larger than the Pauli paramagnetic limit, providing an ideal platform to shed light on the unconventional superconductivity.