Engineering a pure Dirac regime in ZrTe$_5$
Real-world topological semimetals typically exhibit Dirac and Weyl nodes that coexist with trivial Fermi pockets.This tends to mask the physics of the relativistic quasiparticles.Using the example of ZrTe$_5$, we show that wiha 77891 strain provides a powerful tool for in-situ tuning of the band structure such that all trivial pockets are pushed fa