phonon calculation for monolayer
&inputph
  tr2_ph=1.0d-14,
  prefix='mlg',
  trans=.true.,
  ldisp = .true.,
  elph = .true. ,
  nq1=8,nq2=8,nq3=1,
  amass(1)=12.0107,
  outdir='./',
  fildyn='phband.dynG',
  fildrho='phband.drho',
  fildvscf='phbanddv',
 /