Hello all!

Thanks for all the help so far!

I'm now having an issue getting dDmax in my SCF calculations to move anywhere 
below 1.0:

siesta: iscf   Eharris(eV)      E_KS(eV)   FreeEng(eV)   dDmax  Ef(eV)
siesta:    1   -55279.4019   -54866.8984   -54866.8984  1.8078 -4.1119
timer: Routine,Calls,Time,% = IterSCF        1   78511.227  96.73
elaps: Routine,Calls,Wall,% = IterSCF        1    3972.463  97.47
siesta:    2   -56569.5706   -54935.4817   -54998.0432  1.4103 -0.6808
siesta:    3   -56458.1370   -54943.8818   -55040.7807  1.2056 -1.5842
siesta:    4   -56653.2502   -54947.8429   -55036.0493  1.8025 -1.2048
siesta:    5   -56850.7918   -54948.5110   -55021.8909  1.6664 -1.9393
siesta:    6   -56925.8454   -54947.7056   -55013.4623  1.9448 -2.1386
siesta:    7   -56988.6476   -54945.1035   -55005.7856  1.9900 -2.1200
siesta:    8   -56903.7554   -54942.1942   -54995.7603  2.0173 -2.4747
siesta:    9   -56889.2759   -54938.0499   -54997.5861  2.0881 -2.2071
siesta:   10   -56777.1928   -54934.0747   -54989.4649  2.1059 -2.4257
siesta:   11   -56776.7970   -54928.9014   -54988.8325  2.1666 -2.2701

I have tried raising the electronic temperature (quite high now actually), I've 
systematically adjusted the mixing parameters, my energy cutoff is at 400 Ry, 
I'm using  18 k-points.

The system I'm studying is a bulk Aurivillius phase (n=3) with Ti on the B site 
and La on the A site.  It is non magnetic (600 electrons included in the 
calculation). Specifically Aurivillius phases are a perovskite structure 
layered between (BiO2)2+ layers.

Can anyone point me in a direction which would allow me to figure out what is 
going on?

Cheers,
Rob

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