Dear all qe users:
Im a new user to qe,and i want to do some optimizations on tetragonal phase
PbTiO3 with constraints in-plane to study the phase transition under different
epitaxial strain ,but i dont know how to do optimization with the lattice
parameters in-plane being fixed and all atoms the lattice parameter
out-of-plane being relaxed in qe. Can anyone help me?
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