External-field-induced transition from altermagnetic metal to fully-compensated ferrimagnetic metal in monolayer $\mathrm{C}{\mathrm{r}}_2\mathrm{O}$

San-Dong Guo, Qiqi Luo, Shi-Hao Zhang +1

Altermagnets and fully-compensated ferrimagnets are two canonical classes of zero-net-moment magnets. An altermagnetic (AM) half-metal cannot exist due to its AM spin splitting, wh…