Fully gapped $d$-wave superconductivity in CeCu${}_2$Si${}_2$

G. M. Pang, M. Smidman, J. L. Zhang +13

The nature of the pairing symmetry of the first heavy fermion superconductor CeCu${}_2$Si${}_2$ has recently become the subject of controversy. While CeCu${}_2$Si${}_2$ was generally belie…