Origin of light-induced metastability in ZrTe$_5$
Origin of light-induced metastability in ZrTe$_5$
We study the non-equilibrium electronic structure of a model Dirac semimetal ZrTe$_5$ by using time-and-angle resolved photoemission spectroscopy and density functional theory-based electron and phonon calculations. By measuring the electronic dispersion near the $\Gamma$ point at time delays up to 10 picoseconds, we discovered that the band spectral weight does …