 ![Band structures of FeS (top), FeSe (middle) and FeTe (bottom) from non-spin-polarized calculations with the LDA relaxed $X$ heights.[]{data-label="fig-bands"}](band-S.ps "fig:"){height="0.0in"} ![Band structures of FeS (top), FeSe (middle) and FeTe (bottom) from non-spin-polarized calculations with the LDA relaxed $X$ heights.[]{data-label="fig-bands"}](band-S