Strong in-plane anisotropy in the electronic structure of fixed-valence $\beta$-LuAlB${}_4$

Pascal Reiss, Jordan Baglo, Hong'En Tan +6

The origin of intrinsic quantum criticality in the heavy-fermion superconductor $\beta$-YbAlB${}_4$ has been attributed to strong Yb valence fluctuations and its peculiar crystal structu…