Tuning the speed to of Dirac fermions to zero

In our recently published paper we show that Dirac fermions do not like to get their speed to zero,  unless they really have to. Knowing how many knobs we need to fine-tune lays the foundation to find new topological flat bands with the possibility for exotic correlated phases:

https://journals.aps.org/prx/abstract/10.1103/PhysRevX.13.021012