Superconductivity at 7.3 K in the 133-type Cr-based RbCr3As3 single crystals Tong Liu, Qing-Ge Mu, Bo-Jin Pan, Jia Yu, Bin-Bin Ruan, Kang Zhao, Gen-Fu Chen and Zhi-An Ren EPL, 120 2 (2017) 27006 Published online: 15 January 2018 DOI: 10.1209/0295-5075/120/27006