Hope this helps someone: in pw.x (espresso 5.1.2), with cell_dofree = '2Dshape' , the area (and volume) of the cell are actually not conserved.
Digging around a bit, it looks like the power is wrong in flib impose_deviatoric_strain_2d: In line 59, the power of 1/3 should be 1/2 (i.e., the final 3.d0 should be 2.d0), otherwise area is not conserved!!! Niels --- Prof. Niels R. Walet Phone: +44(0)1613063693 School of Physics and Astronomy Fax: +44(0)1613064303 The University of Manchester Mobile: +44(0)7516622121 Manchester, M13 9PL, UK room 7.7, Schuster Building email: niels.wa...@manchester.ac.uk web: http://www.theory.physics.manchester.ac.uk/~mccsnrw<../../owa/redir.aspx?C=8f9098c1943846dcba17536b8618a38a&URL=http%3a%2f%2fwww.theory.physics.manchester.ac.uk%2f%7emccsnrw>
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