Quantum Criticality Based on Large Ising Spins: YbCo${}_2$Ge${}_4$ with New 1-2-4 Structure Type

K. Kitagawa, Y. Kishimoto, M. Iwatani +8

We present a new type of quantum critical material YbCo${}_2$Ge${}_4$, having the largest quantum-critical pseudospin size ever. The YbCo${}_2$Ge${}_4$-type structure is new, forms in the…