Multiband superconductivity and possible nodal gap in RbCr${}_3$As${}_3$ revealed by Andreev reflection and single-particle tunneling measurements

Zhixin Liu, Mingyang Chen, Ying Xiang +7

By measuring point-contact Andreev reflection (PCAR) spectra in the newly discovered chromium-based quasi-one-dimensional superconductor RbCr${}_3$As${}_3$, we find clear evidence…