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Dear Lu,
I am going to calculate SOC for molecules at the ground state. It should be quite straight forward.
For example, I am trying to use "RESC" keyword to include SOC effect. There are large energetic difference with and without "RESC" key. I guess, I am wrong enough. Could you help to setup input keywords for it using ORCA or GAUSSIAN?
%chk=cw_gaussian.chk
#p B3LYP/LANL2DZ Integral(Grid=Ultrafine, RESC)
cw_gaussian B3LYP/LANL2DZ Integral(Grid=Ultrafine, RESC)
0 1
C 14.87243455 12.47693543 15.22325442
C 13.93310489 13.06163521 16.15796408
C 15.95330415 13.18085517 14.55020466
C 14.73431460 11.08055594 14.95313452
C 12.69428535 12.39512546 16.37120400
C 17.07347374 12.40262545 14.12555482
C 14.19338480 14.24213478 16.96037378
C 15.98885414 14.59952465 14.25797477
C 13.10813519 14.88323454 17.63792353
C 17.25521367 15.20612442 14.02778486
C 13.53368504 10.40066619 15.29783439
C 15.80009421 10.35965620 14.34938474
C 12.50597541 11.06675594 15.89975417
C 16.97282378 10.98659597 14.04554485
C 11.64233573 13.04381522 17.08508374
C 18.29366329 13.04024522 13.76879495
C 11.81696567 14.28050476 17.63069354
C 18.40679325 14.39951472 13.81574493
C 15.49574432 14.73398460 17.21039369
C 13.34573511 16.06112411 18.38432326
C 17.37335363 16.62767390 13.97966487
C 15.70976424 15.84821419 17.99726340
C 14.62463464 16.54628393 18.55709320
H 13.44215507 9.34661657 15.03818449
H 15.67544425 9.28946659 14.18774480
H 11.55194576 10.57649612 16.09304410
H 17.83415346 10.42577618 13.68524498
H 10.68839608 12.52406541 17.17865370
H 19.14284298 12.41675545 13.49225505
H 10.99826597 14.79002458 18.13907335
H 19.35989290 14.89313454 13.62566500
H 16.35071400 14.20460479 16.80026384
H 12.49634542 16.55891393 18.85265309
H 18.36860326 17.05637375 13.85894492
H 16.72883387 16.17986407 18.19001333
H 14.79725457 17.44196360 19.15148298
C 16.27817403 17.43179361 14.08700483
C 14.97119451 16.86377382 14.08829483
C 14.81714457 15.44093434 14.10308483
C 13.82906493 17.69147351 13.98233487
C 13.52615504 14.92526453 13.84316492
C 12.57596539 17.15048371 13.78931494
H 13.96586488 18.77273312 14.02070486
C 12.43550544 15.75536422 13.67726499
H 13.39454509 13.85222492 13.73858496
H 11.70665571 17.79830347 13.68785498
H 11.46287580 15.32237438 13.44893507
H 16.37741399 18.51728321 14.09081483
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In Gaussian, RESC can only represent scalar relativistic effect, SOC is not incorporated. In addition, relativistic Hamiltonian cannot be used in conjunction with pseudopotential.
If you want to incorporate SOC effect into DFT ground state calculation, you can consider to use spin-orbit DFT feature in NWChem. I have a blog article written in Chinese, you may use Google translator to understand the content: http://sobereva.com/368
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