Switchable half-quantum flux states in a ring of the kagome superconductor CsV${}_3$Sb${}_5$

Shuo Wang, Ilaria Maccari, Xilin Feng +14

Magnetic flux quantization in units of $\hat{I}{¦}_0=h/2e$ is a defining feature of superconductivity, rooted in the charge-2e nature of Cooper pairs. In a ring geometry, the flux quanti…