Anisotropic two-gap superconductivity and the absence of a Pauli paramagnetic limit in single-crystalline LaO${}_{0.5}$F${}_{0.5}$BiS${}_2$

Y. C. Chan, K. Y. Yip, Y. W. Cheung +9

Ambient-pressure-grown LaO${}_{0.5}$F${}_{0.5}$BiS${}_2$ with a superconducting transition temperature $T_c\sim$3K possesses a highly anisotropic normal state. By a series of electrica…