Dear qe users, I need your help!recently,I am doing CPMD in
qe for Fe2O3,I have done the following steps:
(1)electron structure optimition
(2)ion structure optimition
I have two questions:
First:
but the second step is failed,the force,etot,ekin are fluctuated,but noe
converge.and i think it is maybe my initial structure is far from Stable
structure.So i relax my structure in pw.x,and the n, i use the Optimized cell
to make a slab Model,then relax this big structure in pw.x too.the i copy
the atomic position to cp.x do step 1 and 2 above.but the force,etot,ekin
can ont converge too.and even if i reduce the emass from 400 to 100,they are
not converged too.if i can relax my sysdem in pw.x and just do md in cp.x?if i
can do this ,how should i set the relative parameters ,because there are
smearing and starting_magnetization in pw.x but in cp.x ,they are not
exist.
second:
as above say,the parameter is not converged,I have got large
pressure,should i reduce it by vc-cp before md?and the parameter is not
converge is relative to the pressure?
the following is my input file in cp.x and the evp.file .
&CONTROL
calculation = 'cp',
title = ' MD Simulation' ,
restart_mode = 'reset_counters',
ndr =93,ndw =94,
nstep = 50000,
iprint = 10,
isave = 10,
dt = 1.0,
tstress = .TRUE.,
tprnfor = .TRUE.,
prefix = 'al',
pseudo_dir = '/home/YangQing/111Unose/',
outdir= '/home/YangQing/111Unose/tmp/'
etot_conv_thr=1.0d-6,
ekin_conv_thr=1.0d-7,
forc_conv_thr=1.0d-3
/
&SYSTEM
ibrav= 4, nat= 40, ntyp= 4, celldm(1)=9.672185, celldm(3)=5.861321,
ecutwfc = 40,
ecutrho = 400,
nr1b=20,nr2b=20,nr3b=20
nspin=2,
vdw_corr='DFT-D',
london_s6 = 0.75,
/
&ELECTRONS
electron_dynamics = 'verlet',
electron_velocities='zero',
emass = 100,
emass_cutoff = 2.5,
/
&IONS
ion_dynamics = 'verlet',
ion_velocities='zero',
ion_temperature='nose',
tempw=300,
fnosep=5,
/
ATOMIC_SPECIES
O 15.9994 O.pbe-rrkjus.UPF
Fe 55.845 Fe.pbe-n-rrkjus_psl.0.2.4.UPF
ATOMIC_POSITIONS (crystal)
Fe 0.333330000 0.666670000
0.042000000 0 0 0
O 0.361910000 0.028630000
0.070950000 0 0 0
O 0.666730000 0.638090000
0.070950000 0 0 0
O 0.971370000 0.333270000
0.070950000 0 0 0
Fe 0.000000000 0.000000000
0.099930000 0 0 0
Fe 0.666670000 0.333330000
0.119570000 0 0 0
O 0.695250000 0.000000000
0.148540000 0 0 0
O -0.000000000 0.695250000
0.148540000 0 0 0
O 0.304750000 0.304750000
0.148540000 0 0 0
Fe 0.333337492 0.666622327
0.171721829
Fe 0.000025879 -0.000216278 0.209897303
O 0.638436173 0.666710684
0.224754937
O 0.028617572 0.361417637
0.224724973
O 0.333086051 0.971185926
0.224715874
evp:# nfi time(ps)
ekinc T_cell(K) Tion(K)
etot
enthal
econs econt
Volume
Pressure(GPa) EXX
EVDW
1 1.209442E-05 4.427985E-10
0.000000E+00 6.013527E-05 -655.53321568
-655.53321568 -655.53321567
-655.53321567 2.138038E+03
451.07740
2 2.418884E-05 1.959757E-06
0.000000E+00 4.789356E-04 -655.53214040
-655.53214040 -655.53214033
-655.53213837 2.138038E+03
451.08119
3 3.628326E-05 5.101158E-06
0.000000E+00 1.228347E-03 -655.53093436
-655.53093436 -655.53093418
-655.53092908 2.138038E+03
451.08116
4 4.837769E-05 5.515293E-06
0.000000E+00 2.182674E-03 -655.52863322
-655.52863322 -655.52863291
-655.52862740 2.138038E+03
451.15026
5 6.047211E-05 3.388820E-06
0.000000E+00 3.273201E-03 -655.53321606
-655.53321606 -655.53321560
-655.53321221 2.138038E+03
451.04469
6 7.256653E-05 1.435772E-06
0.000000E+00 4.470802E-03 -655.53321624
-655.53321624 -655.53321560
-655.53321416 2.138038E+03
451.09025
7 8.466095E-05 2.044603E-06
0.000000E+00 5.725044E-03 -655.53338089
-655.53338089 -655.53338008
-655.53337803 2.138038E+03
451.09962
8 9.675537E-05 3.689591E-06
0.000000E+00 6.993080E-03 -655.52937989
-655.52937989 -655.52937889
-655.52937520 2.138038E+03
451.10591
9 1.088498E-04 4.726224E-06
0.000000E+00 8.188382E-03 -655.53095833
-655.53095833 -655.53095716
-655.53095244 2.138038E+03
451.08397
10 1.209442E-04 7.320059E-06
0.000000E+00 9.360416E-03 -655.53191675
-655.53191675 -655.53191542
-655.53190810 2.138038E+03
451.09711
11 1.330386E-04 8.601086E-06
0.000000E+00 1.053273E-02 -655.52742896
-655.52742896 -655.52742746
-655.52741886 2.138038E+03
451.12524
12 1.451331E-04 7.561896E-06
0.000000E+00 1.164961E-02 -655.52598326
-655.52598326 -655.52598160
-655.52597404 2.138038E+03
451.13785
13 1.572275E-04 5.951578E-06
0.000000E+00 1.269513E-02 -655.53363814
-655.53363814 -655.53363633
-655.53363038 2.138038E+03
451.05652
14 1.693219E-04 4.943946E-06
0.000000E+00 1.369268E-02 -655.53100753
-655.53100753 -655.53100558
-655.53100064 2.138038E+03
451.12477
15 1.814163E-04 5.352309E-06
0.000000E+00 1.462611E-02 -655.53034805
-655.53034805 -655.53034597
-655.53034061 2.138038E+03
451.07976
16 1.935107E-04 5.297096E-06
0.000000E+00 1.545432E-02 -655.53341503
-655.53341503 -655.53341283
-655.53340753 2.138038E+03
451.08453
17 2.056052E-04 5.017530E-06
0.000000E+00 1.620779E-02 -655.53580260
-655.53580260 -655.53580029
-655.53579527 2.138038E+03
451.08137
18 2.176996E-04 5.040684E-06
0.000000E+00 1.689894E-02 -655.53329933
-655.53329933 -655.53329692
-655.53329188 2.138038E+03
451.07388
19 2.297940E-04 6.391033E-06
0.000000E+00 1.757475E-02 -655.53495278
-655.53495278 -655.53495028
-655.53494389 2.138038E+03
451.06434
20 2.418884E-04 6.244264E-06
0.000000E+00 1.819279E-02 -655.53219962
-655.53219962 -655.53219703
-655.53219078 2.138038E+03
451.09528
21 2.539829E-04 4.887425E-06
0.000000E+00 1.874105E-02 -655.53220327
-655.53220327 -655.53220060
-655.53219571 2.138038E+03
451.09117
22 2.660773E-04 4.769317E-06
0.000000E+00 1.926632E-02 -655.52540383
-655.52540383 -655.52540108
-655.52539631 2.138038E+03
451.14288
23 2.781717E-04 4.377049E-06
0.000000E+00 1.976052E-02 -655.52799266
-655.52799266 -655.52798984
-655.52798546 2.138038E+03
451.10798
24 2.902661E-04 4.759776E-06
0.000000E+00 2.019745E-02 -655.52720597
-655.52720597 -655.52720309
-655.52719833 2.138038E+03
451.11863
25 3.023605E-04 4.775946E-06
0.000000E+00 2.057815E-02 -655.53230039
-655.53230039 -655.53229746
-655.53229268 2.138038E+03
451.09109
26 3.144550E-04 4.903412E-06
0.000000E+00 2.093815E-02 -655.53240294
-655.53240294 -655.53239995
-655.53239505 2.138038E+03
451.10384
27 3.265494E-04 6.061038E-06
0.000000E+00 2.127424E-02 -655.52820287
-655.52820287 -655.52819984
-655.52819377 2.138038E+03
451.10803
28 3.386438E-04 6.380108E-06
0.000000E+00 2.157264E-02 -655.53020991
-655.53020991 -655.53020683
-655.53020045 2.138038E+03
451.08834
29 3.507382E-04 4.451595E-06
0.000000E+00 2.182125E-02 -655.53031110
-655.53031110 -655.53030799
-655.53030354 2.138038E+03
451.10282
30 3.628326E-04 2.824358E-06
0.000000E+00 2.201272E-02 -655.53652820
-655.53652820 -655.53652506
-655.53652224 2.138038E+03
451.05545
31 3.749271E-04 5.006324E-06
0.000000E+00 2.218392E-02 -655.53541070
-655.53541070 -655.53540754
-655.53540254 2.138038E+03
451.07392
32 3.870215E-04 7.467492E-06
0.000000E+00 2.235398E-02 -655.53120981
-655.53120981 -655.53120663
-655.53119916 2.138038E+03
451.10841
33 3.991159E-04 6.024380E-06
0.000000E+00 2.250814E-02 -655.53512561
-655.53512561 -655.53512241
-655.53511638 2.138038E+03
451.06402
34 4.112103E-04 2.797069E-06
0.000000E+00 2.265119E-02 -655.53091489
-655.53091489 -655.53091166
-655.53090886 2.138038E+03
451.10132
35 4.233048E-04 1.524447E-06
0.000000E+00 2.281375E-02 -655.52869654
-655.52869654 -655.52869329
-655.52869177 2.138038E+03
451.11548
36 4.353992E-04 2.465519E-06
0.000000E+00 2.294776E-02 -655.53003366
-655.53003366 -655.53003039
-655.53002793 2.138038E+03
451.07870
37 4.474936E-04 4.473792E-06
0.000000E+00 2.305008E-02 -655.52526350
-655.52526350 -655.52526022
-655.52525574 2.138038E+03
451.15059
38 4.595880E-04 7.285398E-06
0.000000E+00 2.315766E-02 -655.52711532
-655.52711532 -655.52711202
-655.52710473 2.138038E+03
451.10529
39 4.716824E-04 7.460645E-06
0.000000E+00 2.324032E-02 -655.53130794
-655.53130794 -655.53130462
-655.53129716 2.138038E+03
451.09982
40 4.837769E-04 4.003520E-06
0.000000E+00 2.326959E-02 -655.53512477
-655.53512477 -655.53512146
-655.53511745 2.138038E+03
451.07811
41 4.958713E-04 1.832438E-06
0.000000E+00 2.331428E-02 -655.53512552
-655.53512552 -655.53512219
-655.53512036 2.138038E+03
451.06948
42 5.079657E-04 1.238105E-06
0.000000E+00 2.339646E-02 -655.53092160
-655.53092160 -655.53091826
-655.53091702 2.138038E+03
451.10187
43 5.200601E-04 1.352936E-06
0.000000E+00 2.343645E-02 -655.53006122
-655.53006122 -655.53005788
-655.53005653 2.138038E+03
451.08527
44 5.321546E-04 3.332193E-06
0.000000E+00 2.343948E-02 -655.53212145
-655.53212145 -655.53211811
-655.53211477 2.138038E+03
451.07134
45 5.442490E-04 5.903364E-06
0.000000E+00 2.345045E-02 -655.53606091
-655.53606091 -655.53605757
-655.53605167 2.138038E+03
451.07530
46 5.563434E-04 6.310505E-06
0.000000E+00 2.346936E-02 -655.53025878
-655.53025878 -655.53025543
-655.53024912 2.138038E+03
451.09928
47 5.684378E-04 5.420946E-06
0.000000E+00 2.351109E-02 -655.52548923
-655.52548923 -655.52548587
-655.52548045 2.138038E+03
451.13552
48 5.805322E-04 4.025246E-06
0.000000E+00 2.353505E-02 -655.52804182
-655.52804182 -655.52803847
-655.52803444 2.138038E+03
451.10784
49 5.926267E-04 3.029297E-06
0.000000E+00 2.355489E-02 -655.52804428
-655.52804428 -655.52804092
-655.52803789 2.138038E+03
451.12015
50 6.047211E-04 2.307335E-06
0.000000E+00 2.356322E-02 -655.53666405
-655.53666405 -655.53666069
-655.53665838 2.138038E+03
451.04918
51 6.168155E-04 2.019064E-06
0.000000E+00 2.357633E-02 -655.53109622
-655.53109622 -655.53109286
-655.53109084 2.138038E+03
451.13021
52 6.289099E-04 3.131306E-06
0.000000E+00 2.359641E-02 -655.53346552
-655.53346552 -655.53346216
-655.53345902 2.138038E+03
451.06292
53 6.410043E-04 3.790362E-06
0.000000E+00 2.355034E-02 -655.53559430
-655.53559430 -655.53559095
-655.53558715 2.138038E+03
451.07305
54 6.530988E-04 4.227443E-06
0.000000E+00 2.350884E-02 -655.53341864
-655.53341864 -655.53341529
-655.53341106 2.138038E+03
451.07864
55 6.651932E-04 4.306007E-06
0.000000E+00 2.351020E-02 -655.52732289
-655.52732289 -655.52731954
-655.52731523 2.138038E+03
451.11989
56 6.772876E-04 3.621355E-06
0.000000E+00 2.349086E-02 -655.53045692
-655.53045692 -655.53045357
-655.53044995 2.138038E+03
451.07747
57 6.893820E-04 3.214427E-06
0.000000E+00 2.349037E-02 -655.52831726
-655.52831726 -655.52831391
-655.52831070 2.138038E+03
451.12247
58 7.014765E-04 3.788039E-06
0.000000E+00 2.352621E-02 -655.52611910
-655.52611910 -655.52611575
-655.52611196 2.138038E+03
451.13033
59 7.135709E-04 3.568466E-06
0.000000E+00 2.353021E-02 -655.53046176
-655.53046176 -655.53045840
-655.53045483 2.138038E+03
451.07116
60 7.256653E-04 3.231092E-06
0.000000E+00 2.351522E-02 -655.53046480
-655.53046480 -655.53046144
-655.53045821 2.138038E+03
451.10395
61 7.377597E-04 4.434761E-06
0.000000E+00 2.351164E-02 -655.53338605
-655.53338605 -655.53338270
-655.53337826 2.138038E+03
451.08836
62 7.498541E-04 4.330750E-06
0.000000E+00 2.345824E-02 -655.53511115
-655.53511115 -655.53510781
-655.53510348 2.138038E+03
451.06426
63 7.619486E-04 4.011318E-06
0.000000E+00 2.340988E-02 -655.53661196
-655.53661196 -655.53660863
-655.53660461 2.138038E+03
451.05678
64 7.740430E-04 4.319475E-06
0.000000E+00 2.340095E-02 -655.53226036
-655.53226036 -655.53225703
-655.53225271 2.138038E+03
451.10133
65 7.861374E-04 3.267563E-06
0.000000E+00 2.338367E-02 -655.53226001
-655.53226001 -655.53225668
-655.53225341 2.138038E+03
451.08453
66 7.982318E-04 2.078107E-06
0.000000E+00 2.336908E-02 -655.52806374
-655.52806374 -655.52806041
-655.52805833 2.138038E+03
451.12225
67 8.103262E-04 1.604730E-06
0.000000E+00 2.336394E-02 -655.53047646
-655.53047646 -655.53047313
-655.53047152 2.138038E+03
451.07546
68 8.224207E-04 2.336826E-06
0.000000E+00 2.335002E-02 -655.52538738
-655.52538738 -655.52538405
-655.52538171 2.138038E+03
451.14914
69 8.345151E-04 4.505088E-06
0.000000E+00 2.333864E-02 -655.52990208
-655.52990208 -655.52989875
-655.52989425 2.138038E+03
451.07714
70 8.466095E-04 5.990235E-06
0.000000E+00 2.334567E-02 -655.52833700
-655.52833700 -655.52833367
-655.52832768 2.138038E+03
451.11917
71 8.587039E-04 5.269851E-06
0.000000E+00 2.335165E-02 -655.52833422
-655.52833422 -655.52833089
-655.52832562 2.138038E+03
451.10569
72 8.707984E-04 3.015579E-06
0.000000E+00 2.331952E-02 -655.53454830
-655.53454830 -655.53454498
-655.53454196 2.138038E+03
451.05747
73 8.828928E-04 1.575546E-06
0.000000E+00 2.327035E-02 -655.53454929
-655.53454929 -655.53454598
-655.53454440 2.138038E+03
451.08142
74 8.949872E-04 1.833843E-06
0.000000E+00 2.323008E-02 -655.53663145
-655.53663145 -655.53662814
-655.53662630 2.138038E+03
451.05816
75 9.070816E-04 2.548989E-06
0.000000E+00 2.320387E-02 -655.53002598
-655.53002598 -655.53002268
-655.53002013 2.138038E+03
451.12373
76 9.191760E-04 4.021881E-06
0.000000E+00 2.319888E-02 -655.53051673
-655.53051673 -655.53051342
-655.53050940 2.138038E+03
451.07631
77 9.312705E-04 4.802911E-06
0.000000E+00 2.319526E-02 -655.53346663
-655.53346663 -655.53346332
-655.53345852 2.138038E+03
451.05437
78 9.433649E-04 4.171698E-06
0.000000E+00 2.316885E-02 -655.52934642
-655.52934642 -655.52934312
-655.52933894 2.138038E+03
451.11512
79 9.554593E-04 3.452960E-06
0.000000E+00 2.312571E-02 -655.52935091
-655.52935091 -655.52934761
-655.52934416 2.138038E+03
451.10129
80 9.675537E-04 2.301590E-06
0.000000E+00 2.308280E-02 -655.53229020
-655.53229020 -655.53228692
-655.53228461 2.138038E+03
451.09403
81 9.796482E-04 1.349247E-06
0.000000E+00 2.306465E-02 -655.53092390
-655.53092390 -655.53092062
-655.53091927 2.138038E+03
451.09339
82 9.917426E-04 1.531968E-06
0.000000E+00 2.308952E-02 -655.52874690
-655.52874690 -655.52874361
-655.52874208 2.138038E+03
451.11549
83 1.003837E-03 2.642905E-06
0.000000E+00 2.312288E-02 -655.52836543
-655.52836543 -655.52836214
-655.52835950 2.138038E+03
451.09702
84 1.015931E-03 3.330172E-06
0.000000E+00 2.309713E-02 -655.53110114
-655.53110114 -655.53109785
-655.53109452 2.138038E+03
451.09582
85 1.028026E-03 3.702737E-06
0.000000E+00 2.303432E-02 -655.53204207
-655.53204207 -655.53203879
-655.53203509 2.138038E+03
451.10244
86 1.040120E-03 5.438610E-06
0.000000E+00 2.302022E-02 -655.53204820
-655.53204820 -655.53204492
-655.53203948 2.138038E+03
451.08789
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