<div>hi everyone ,</div>
<div>i am now do a relax job.my uint cell is a supercell . and i only want to relax a direction of lattice ,for example c .</div>
<div>so i tried to vary the c .and compute. see the stress.but i do not know how to adjust the c on the base of the result like:<br clear="all"></div>
<p> entering subroutine stress ...</p>
<p> total stress (Ry/bohr**3) (kbar) P= -1.06<br> -0.00000893 -0.00000001 -0.00000001 -1.31 0.00 0.00<br> -0.00000001 -0.00000892 0.00000000 0.00 -
1.31 0.00<br> -0.00000001 0.00000000 -0.00000382 0.00 0.00 -0.56<br></p>
<p> </p>
<div>(10there is "-0.56" and the "-" stands for .i should the reduce c?
<p> (2)0.56 is a large stres?</p>
<p>(3) is there any other way to determine the suitable c?</p>
<p>thank you very much if you could give a advice .</p>
<p>bests </p></div>
<div> </div>
<div><br>-- <br>Xu Yuehua<br>physics Department of Nanjing university<br>China </div>