Emergent altermagnetism in (LaVO$_3$)$_n$/(LaNiO$_3$)$_m$ superlattices from interfacial charge transfer and octahedral tilts

Using first-principles calculations, we show that altermagnetism emerges in (LaVO$_3$)$_n$/(LaNiO$_3$)$_m$ superlattices, with $(n,m) = (1,1), (2,2)$ and $(2,4)$, from the interplay of interfacial charge transfer and octahedral tilts. Charge transfer drives the system towards the V$^{4+}$ and Ni$^{2