35 |
|
* |
36 |
|
* [1] Meineke, et al., J. Comp. Chem. 26, 252-271 (2005). |
37 |
|
* [2] Fennell & Gezelter, J. Chem. Phys. 124, 234104 (2006). |
38 |
< |
* [3] Sun, Lin & Gezelter, J. Chem. Phys. 128, 24107 (2008). |
39 |
< |
* [4] Vardeman & Gezelter, in progress (2009). |
38 |
> |
* [3] Sun, Lin & Gezelter, J. Chem. Phys. 128, 234107 (2008). |
39 |
> |
* [4] Kuang & Gezelter, J. Chem. Phys. 133, 164101 (2010). |
40 |
> |
* [5] Vardeman, Stocker & Gezelter, J. Chem. Theory Comput. 7, 834 (2011). |
41 |
|
*/ |
42 |
|
|
43 |
|
#include <stdio.h> |
54 |
|
EAM::EAM() : name_("EAM"), initialized_(false), forceField_(NULL), |
55 |
|
mixMeth_(eamJohnson), eamRcut_(0.0), haveCutoffRadius_(false) {} |
56 |
|
|
57 |
< |
EAMParam EAM::getEAMParam(AtomType* atomType) { |
58 |
< |
|
59 |
< |
// Do sanity checking on the AtomType we were passed before |
60 |
< |
// building any data structures: |
61 |
< |
if (!atomType->isEAM()) { |
61 |
< |
sprintf( painCave.errMsg, |
62 |
< |
"EAM::getEAMParam was passed an atomType (%s) that does not\n" |
63 |
< |
"\tappear to be an embedded atom method (EAM) atom.\n", |
64 |
< |
atomType->getName().c_str()); |
65 |
< |
painCave.severity = OPENMD_ERROR; |
66 |
< |
painCave.isFatal = 1; |
67 |
< |
simError(); |
68 |
< |
} |
69 |
< |
|
70 |
< |
GenericData* data = atomType->getPropertyByName("EAM"); |
71 |
< |
if (data == NULL) { |
72 |
< |
sprintf( painCave.errMsg, "EAM::getEAMParam could not find EAM\n" |
73 |
< |
"\tparameters for atomType %s.\n", |
74 |
< |
atomType->getName().c_str()); |
75 |
< |
painCave.severity = OPENMD_ERROR; |
76 |
< |
painCave.isFatal = 1; |
77 |
< |
simError(); |
78 |
< |
} |
79 |
< |
|
80 |
< |
EAMParamGenericData* eamData = dynamic_cast<EAMParamGenericData*>(data); |
81 |
< |
if (eamData == NULL) { |
82 |
< |
sprintf( painCave.errMsg, |
83 |
< |
"EAM::getEAMParam could not convert GenericData to EAMParam for\n" |
84 |
< |
"\tatom type %s\n", atomType->getName().c_str()); |
85 |
< |
painCave.severity = OPENMD_ERROR; |
86 |
< |
painCave.isFatal = 1; |
87 |
< |
simError(); |
88 |
< |
} |
89 |
< |
|
90 |
< |
return eamData->getData(); |
91 |
< |
} |
57 |
> |
CubicSpline* EAM::getPhi(AtomType* atomType1, AtomType* atomType2) { |
58 |
> |
EAMAdapter ea1 = EAMAdapter(atomType1); |
59 |
> |
EAMAdapter ea2 = EAMAdapter(atomType2); |
60 |
> |
CubicSpline* z1 = ea1.getZ(); |
61 |
> |
CubicSpline* z2 = ea2.getZ(); |
62 |
|
|
93 |
– |
CubicSpline* EAM::getZ(AtomType* atomType) { |
94 |
– |
EAMParam eamParam = getEAMParam(atomType); |
95 |
– |
int nr = eamParam.nr; |
96 |
– |
RealType dr = eamParam.dr; |
97 |
– |
vector<RealType> rvals; |
98 |
– |
|
99 |
– |
for (int i = 0; i < nr; i++) rvals.push_back(RealType(i) * dr); |
100 |
– |
|
101 |
– |
CubicSpline* cs = new CubicSpline(); |
102 |
– |
cs->addPoints(rvals, eamParam.Z); |
103 |
– |
return cs; |
104 |
– |
} |
105 |
– |
|
106 |
– |
RealType EAM::getRcut(AtomType* atomType) { |
107 |
– |
EAMParam eamParam = getEAMParam(atomType); |
108 |
– |
return eamParam.rcut; |
109 |
– |
} |
110 |
– |
|
111 |
– |
CubicSpline* EAM::getRho(AtomType* atomType) { |
112 |
– |
EAMParam eamParam = getEAMParam(atomType); |
113 |
– |
int nr = eamParam.nr; |
114 |
– |
RealType dr = eamParam.dr; |
115 |
– |
vector<RealType> rvals; |
116 |
– |
|
117 |
– |
for (int i = 0; i < nr; i++) rvals.push_back(RealType(i) * dr); |
118 |
– |
|
119 |
– |
CubicSpline* cs = new CubicSpline(); |
120 |
– |
cs->addPoints(rvals, eamParam.rho); |
121 |
– |
return cs; |
122 |
– |
} |
123 |
– |
|
124 |
– |
CubicSpline* EAM::getF(AtomType* atomType) { |
125 |
– |
EAMParam eamParam = getEAMParam(atomType); |
126 |
– |
int nrho = eamParam.nrho; |
127 |
– |
RealType drho = eamParam.drho; |
128 |
– |
vector<RealType> rhovals; |
129 |
– |
vector<RealType> scaledF; |
130 |
– |
|
131 |
– |
for (int i = 0; i < nrho; i++) { |
132 |
– |
rhovals.push_back(RealType(i) * drho); |
133 |
– |
scaledF.push_back( eamParam.F[i] * 23.06054 ); |
134 |
– |
} |
135 |
– |
|
136 |
– |
CubicSpline* cs = new CubicSpline(); |
137 |
– |
cs->addPoints(rhovals, scaledF); |
138 |
– |
return cs; |
139 |
– |
} |
140 |
– |
|
141 |
– |
CubicSpline* EAM::getPhi(AtomType* atomType1, AtomType* atomType2) { |
142 |
– |
EAMParam eamParam1 = getEAMParam(atomType1); |
143 |
– |
EAMParam eamParam2 = getEAMParam(atomType2); |
144 |
– |
CubicSpline* z1 = getZ(atomType1); |
145 |
– |
CubicSpline* z2 = getZ(atomType2); |
146 |
– |
|
63 |
|
// make the r grid: |
64 |
|
|
65 |
|
|
66 |
|
// we need phi out to the largest value we'll encounter in the radial space; |
67 |
|
|
68 |
|
RealType rmax = 0.0; |
69 |
< |
rmax = max(rmax, eamParam1.rcut); |
70 |
< |
rmax = max(rmax, eamParam1.nr * eamParam1.dr); |
69 |
> |
rmax = max(rmax, ea1.getRcut()); |
70 |
> |
rmax = max(rmax, ea1.getNr() * ea1.getDr()); |
71 |
|
|
72 |
< |
rmax = max(rmax, eamParam2.rcut); |
73 |
< |
rmax = max(rmax, eamParam2.nr * eamParam2.dr); |
72 |
> |
rmax = max(rmax, ea2.getRcut()); |
73 |
> |
rmax = max(rmax, ea2.getNr() * ea2.getDr()); |
74 |
|
|
75 |
|
// use the smallest dr (finest grid) to build our grid: |
76 |
|
|
77 |
< |
RealType dr = min(eamParam1.dr, eamParam2.dr); |
77 |
> |
RealType dr = min(ea1.getDr(), ea2.getDr()); |
78 |
|
|
79 |
|
int nr = int(rmax/dr + 0.5); |
80 |
|
|
90 |
|
|
91 |
|
phivals.push_back(0.0); |
92 |
|
|
93 |
< |
for (int i = 1; i < rvals.size(); i++ ) { |
93 |
> |
for (unsigned int i = 1; i < rvals.size(); i++ ) { |
94 |
|
r = rvals[i]; |
95 |
|
|
96 |
|
// only use z(r) if we're inside this atom's cutoff radius, |
98 |
|
// means that our phi grid goes out beyond the cutoff of the |
99 |
|
// pair potential |
100 |
|
|
101 |
< |
zi = r <= eamParam1.rcut ? z1->getValueAt(r) : 0.0; |
102 |
< |
zj = r <= eamParam2.rcut ? z2->getValueAt(r) : 0.0; |
101 |
> |
zi = r <= ea1.getRcut() ? z1->getValueAt(r) : 0.0; |
102 |
> |
zj = r <= ea2.getRcut() ? z2->getValueAt(r) : 0.0; |
103 |
|
|
104 |
|
phi = 331.999296 * (zi * zj) / r; |
105 |
|
|
117 |
|
} |
118 |
|
|
119 |
|
void EAM::initialize() { |
204 |
– |
|
120 |
|
// set up the mixing method: |
121 |
|
ForceFieldOptions& fopts = forceField_->getForceFieldOptions(); |
122 |
|
string EAMMixMeth = fopts.getEAMMixingMethod(); |
130 |
|
mixMeth_ = eamUnknown; |
131 |
|
|
132 |
|
// find all of the EAM atom Types: |
133 |
< |
ForceField::AtomTypeContainer* atomTypes = forceField_->getAtomTypes(); |
134 |
< |
ForceField::AtomTypeContainer::MapTypeIterator i; |
135 |
< |
AtomType* at; |
133 |
> |
EAMtypes.clear(); |
134 |
> |
EAMtids.clear(); |
135 |
> |
EAMdata.clear(); |
136 |
> |
MixingMap.clear(); |
137 |
> |
nEAM_ = 0; |
138 |
> |
|
139 |
> |
EAMtids.resize( forceField_->getNAtomType(), -1); |
140 |
|
|
141 |
< |
for (at = atomTypes->beginType(i); at != NULL; |
142 |
< |
at = atomTypes->nextType(i)) { |
143 |
< |
|
225 |
< |
if (at->isEAM()) |
226 |
< |
addType(at); |
141 |
> |
set<AtomType*>::iterator at; |
142 |
> |
for (at = simTypes_.begin(); at != simTypes_.end(); ++at) { |
143 |
> |
if ((*at)->isEAM()) nEAM_++; |
144 |
|
} |
145 |
+ |
EAMdata.resize(nEAM_); |
146 |
+ |
MixingMap.resize(nEAM_); |
147 |
+ |
|
148 |
+ |
for (at = simTypes_.begin(); at != simTypes_.end(); ++at) { |
149 |
+ |
if ((*at)->isEAM()) addType(*at); |
150 |
+ |
} |
151 |
|
|
152 |
|
// find all of the explicit EAM interactions (setfl): |
153 |
|
ForceField::NonBondedInteractionTypeContainer* nbiTypes = forceField_->getNonBondedInteractionTypes(); |
200 |
|
|
201 |
|
void EAM::addType(AtomType* atomType){ |
202 |
|
|
203 |
+ |
EAMAdapter ea = EAMAdapter(atomType); |
204 |
|
EAMAtomData eamAtomData; |
281 |
– |
|
282 |
– |
eamAtomData.rho = getRho(atomType); |
283 |
– |
eamAtomData.F = getF(atomType); |
284 |
– |
eamAtomData.Z = getZ(atomType); |
285 |
– |
eamAtomData.rcut = getRcut(atomType); |
205 |
|
|
206 |
+ |
eamAtomData.rho = ea.getRho(); |
207 |
+ |
eamAtomData.F = ea.getF(); |
208 |
+ |
eamAtomData.Z = ea.getZ(); |
209 |
+ |
eamAtomData.rcut = ea.getRcut(); |
210 |
+ |
|
211 |
|
// add it to the map: |
212 |
< |
AtomTypeProperties atp = atomType->getATP(); |
212 |
> |
int atid = atomType->getIdent(); |
213 |
> |
int eamtid = EAMtypes.size(); |
214 |
|
|
215 |
< |
pair<map<int,AtomType*>::iterator,bool> ret; |
216 |
< |
ret = EAMlist.insert( pair<int, AtomType*>(atp.ident, atomType) ); |
215 |
> |
pair<set<int>::iterator,bool> ret; |
216 |
> |
ret = EAMtypes.insert( atid ); |
217 |
|
if (ret.second == false) { |
218 |
|
sprintf( painCave.errMsg, |
219 |
|
"EAM already had a previous entry with ident %d\n", |
220 |
< |
atp.ident); |
220 |
> |
atid); |
221 |
|
painCave.severity = OPENMD_INFO; |
222 |
|
painCave.isFatal = 0; |
223 |
|
simError(); |
224 |
|
} |
225 |
|
|
226 |
< |
EAMMap[atomType] = eamAtomData; |
226 |
> |
EAMtids[atid] = eamtid; |
227 |
> |
EAMdata[eamtid] = eamAtomData; |
228 |
> |
MixingMap[eamtid].resize(nEAM_); |
229 |
|
|
230 |
|
// Now, iterate over all known types and add to the mixing map: |
231 |
|
|
232 |
< |
map<AtomType*, EAMAtomData>::iterator it; |
233 |
< |
for( it = EAMMap.begin(); it != EAMMap.end(); ++it) { |
232 |
> |
std::set<int>::iterator it; |
233 |
> |
for( it = EAMtypes.begin(); it != EAMtypes.end(); ++it) { |
234 |
|
|
235 |
< |
AtomType* atype2 = (*it).first; |
235 |
> |
int eamtid2 = EAMtids[ (*it) ]; |
236 |
> |
AtomType* atype2 = forceField_->getAtomType( (*it) ); |
237 |
|
|
238 |
|
EAMInteractionData mixer; |
239 |
|
mixer.phi = getPhi(atomType, atype2); |
240 |
|
mixer.explicitlySet = false; |
241 |
|
|
242 |
< |
pair<AtomType*, AtomType*> key1, key2; |
315 |
< |
key1 = make_pair(atomType, atype2); |
316 |
< |
key2 = make_pair(atype2, atomType); |
242 |
> |
MixingMap[eamtid2].resize( nEAM_ ); |
243 |
|
|
244 |
< |
MixingMap[key1] = mixer; |
245 |
< |
if (key2 != key1) { |
246 |
< |
MixingMap[key2] = mixer; |
244 |
> |
MixingMap[eamtid][eamtid2] = mixer; |
245 |
> |
if (eamtid2 != eamtid) { |
246 |
> |
MixingMap[eamtid2][eamtid] = mixer; |
247 |
|
} |
248 |
|
} |
249 |
|
return; |
267 |
|
mixer.phi = cs; |
268 |
|
mixer.explicitlySet = true; |
269 |
|
|
270 |
< |
pair<AtomType*, AtomType*> key1, key2; |
271 |
< |
key1 = make_pair(atype1, atype2); |
346 |
< |
key2 = make_pair(atype2, atype1); |
270 |
> |
int eamtid1 = EAMtids[ atype1->getIdent() ]; |
271 |
> |
int eamtid2 = EAMtids[ atype2->getIdent() ]; |
272 |
|
|
273 |
< |
MixingMap[key1] = mixer; |
274 |
< |
if (key2 != key1) { |
275 |
< |
MixingMap[key2] = mixer; |
273 |
> |
MixingMap[eamtid1][eamtid2] = mixer; |
274 |
> |
if (eamtid2 != eamtid1) { |
275 |
> |
MixingMap[eamtid2][eamtid1] = mixer; |
276 |
|
} |
277 |
|
return; |
278 |
|
} |
281 |
|
|
282 |
|
if (!initialized_) initialize(); |
283 |
|
|
284 |
< |
EAMAtomData data1 = EAMMap[idat.atypes.first]; |
285 |
< |
EAMAtomData data2 = EAMMap[idat.atypes.second]; |
286 |
< |
|
284 |
> |
EAMAtomData &data1 = EAMdata[EAMtids[idat.atid1]]; |
285 |
> |
EAMAtomData &data2 = EAMdata[EAMtids[idat.atid2]]; |
286 |
> |
|
287 |
|
if (haveCutoffRadius_) |
288 |
|
if ( *(idat.rij) > eamRcut_) return; |
289 |
|
|
301 |
|
|
302 |
|
if (!initialized_) initialize(); |
303 |
|
|
304 |
< |
EAMAtomData data1 = EAMMap[ sdat.atype ]; |
304 |
> |
EAMAtomData &data1 = EAMdata[ EAMtids[sdat.atid] ]; |
305 |
|
|
306 |
< |
pair<RealType, RealType> result = data1.F->getValueAndDerivativeAt( *(sdat.rho) ); |
306 |
> |
data1.F->getValueAndDerivativeAt( *(sdat.rho), *(sdat.frho), *(sdat.dfrhodrho) ); |
307 |
|
|
308 |
< |
*(sdat.frho) = result.first; |
309 |
< |
*(sdat.dfrhodrho) = result.second; |
308 |
> |
(*(sdat.pot))[METALLIC_FAMILY] += *(sdat.frho); |
309 |
> |
if (sdat.doParticlePot) { |
310 |
> |
*(sdat.particlePot) += *(sdat.frho); |
311 |
> |
} |
312 |
|
|
386 |
– |
(*(sdat.pot))[METALLIC_FAMILY] += result.first; |
387 |
– |
*(sdat.particlePot) += result.first; |
388 |
– |
|
313 |
|
return; |
314 |
|
} |
315 |
|
|
321 |
|
if (haveCutoffRadius_) |
322 |
|
if ( *(idat.rij) > eamRcut_) return; |
323 |
|
|
324 |
< |
pair<RealType, RealType> res; |
324 |
> |
|
325 |
> |
int eamtid1 = EAMtids[idat.atid1]; |
326 |
> |
int eamtid2 = EAMtids[idat.atid2]; |
327 |
|
|
328 |
< |
EAMAtomData data1 = EAMMap[idat.atypes.first]; |
329 |
< |
EAMAtomData data2 = EAMMap[idat.atypes.second]; |
328 |
> |
EAMAtomData &data1 = EAMdata[eamtid1]; |
329 |
> |
EAMAtomData &data2 = EAMdata[eamtid2]; |
330 |
|
|
331 |
|
// get type-specific cutoff radii |
332 |
|
|
339 |
|
RealType drhoidr, drhojdr, dudr; |
340 |
|
|
341 |
|
if ( *(idat.rij) < rci) { |
342 |
< |
res = data1.rho->getValueAndDerivativeAt( *(idat.rij)); |
343 |
< |
rha = res.first; |
344 |
< |
drha = res.second; |
419 |
< |
|
420 |
< |
res = MixingMap[make_pair(idat.atypes.first, idat.atypes.first)].phi->getValueAndDerivativeAt( *(idat.rij) ); |
421 |
< |
pha = res.first; |
422 |
< |
dpha = res.second; |
342 |
> |
data1.rho->getValueAndDerivativeAt( *(idat.rij), rha, drha); |
343 |
> |
CubicSpline* phi = MixingMap[eamtid1][eamtid1].phi; |
344 |
> |
phi->getValueAndDerivativeAt( *(idat.rij), pha, dpha); |
345 |
|
} |
346 |
|
|
347 |
|
if ( *(idat.rij) < rcj) { |
348 |
< |
res = data2.rho->getValueAndDerivativeAt( *(idat.rij) ); |
349 |
< |
rhb = res.first; |
350 |
< |
drhb = res.second; |
429 |
< |
|
430 |
< |
res = MixingMap[make_pair(idat.atypes.second, idat.atypes.second)].phi->getValueAndDerivativeAt( *(idat.rij) ); |
431 |
< |
phb = res.first; |
432 |
< |
dphb = res.second; |
348 |
> |
data2.rho->getValueAndDerivativeAt( *(idat.rij), rhb, drhb ); |
349 |
> |
CubicSpline* phi = MixingMap[eamtid2][eamtid2].phi; |
350 |
> |
phi->getValueAndDerivativeAt( *(idat.rij), phb, dphb); |
351 |
|
} |
352 |
|
|
353 |
|
switch(mixMeth_) { |
370 |
|
break; |
371 |
|
|
372 |
|
case eamDaw: |
373 |
< |
res = MixingMap[idat.atypes].phi->getValueAndDerivativeAt( *(idat.rij)); |
456 |
< |
phab = res.first; |
457 |
< |
dvpdr = res.second; |
373 |
> |
MixingMap[eamtid1][eamtid2].phi->getValueAndDerivativeAt( *(idat.rij), phab, dvpdr); |
374 |
|
|
375 |
|
break; |
376 |
|
case eamUnknown: |
392 |
|
|
393 |
|
*(idat.f1) += *(idat.d) * dudr / *(idat.rij); |
394 |
|
|
395 |
< |
// particlePot is the difference between the full potential and |
396 |
< |
// the full potential without the presence of a particular |
397 |
< |
// particle (atom1). |
398 |
< |
// |
399 |
< |
// This reduces the density at other particle locations, so we |
400 |
< |
// need to recompute the density at atom2 assuming atom1 didn't |
401 |
< |
// contribute. This then requires recomputing the density |
402 |
< |
// functional for atom2 as well. |
395 |
> |
if (idat.doParticlePot) { |
396 |
> |
// particlePot is the difference between the full potential and |
397 |
> |
// the full potential without the presence of a particular |
398 |
> |
// particle (atom1). |
399 |
> |
// |
400 |
> |
// This reduces the density at other particle locations, so we |
401 |
> |
// need to recompute the density at atom2 assuming atom1 didn't |
402 |
> |
// contribute. This then requires recomputing the density |
403 |
> |
// functional for atom2 as well. |
404 |
> |
|
405 |
> |
*(idat.particlePot1) += data2.F->getValueAt( *(idat.rho2) - rha ) |
406 |
> |
- *(idat.frho2); |
407 |
> |
|
408 |
> |
*(idat.particlePot2) += data1.F->getValueAt( *(idat.rho1) - rhb) |
409 |
> |
- *(idat.frho1); |
410 |
> |
} |
411 |
|
|
488 |
– |
*(idat.particlePot1) += data2.F->getValueAt( *(idat.rho2) - rha ) |
489 |
– |
- *(idat.frho2); |
490 |
– |
|
491 |
– |
*(idat.particlePot2) += data1.F->getValueAt( *(idat.rho1) - rhb) |
492 |
– |
- *(idat.frho1); |
493 |
– |
|
412 |
|
(*(idat.pot))[METALLIC_FAMILY] += phab; |
413 |
|
|
414 |
|
*(idat.vpair) += phab; |
422 |
|
|
423 |
|
RealType cut = 0.0; |
424 |
|
|
425 |
< |
map<AtomType*, EAMAtomData>::iterator it; |
426 |
< |
|
427 |
< |
it = EAMMap.find(atypes.first); |
428 |
< |
if (it != EAMMap.end()) { |
429 |
< |
EAMAtomData data1 = (*it).second; |
425 |
> |
int atid1 = atypes.first->getIdent(); |
426 |
> |
int atid2 = atypes.second->getIdent(); |
427 |
> |
int eamtid1 = EAMtids[atid1]; |
428 |
> |
int eamtid2 = EAMtids[atid2]; |
429 |
> |
|
430 |
> |
if (eamtid1 != -1) { |
431 |
> |
EAMAtomData data1 = EAMdata[eamtid1]; |
432 |
|
cut = data1.rcut; |
433 |
|
} |
434 |
|
|
435 |
< |
it = EAMMap.find(atypes.second); |
436 |
< |
if (it != EAMMap.end()) { |
517 |
< |
EAMAtomData data2 = (*it).second; |
435 |
> |
if (eamtid2 != -1) { |
436 |
> |
EAMAtomData data2 = EAMdata[eamtid2]; |
437 |
|
if (data2.rcut > cut) |
438 |
|
cut = data2.rcut; |
439 |
|
} |
440 |
< |
|
440 |
> |
|
441 |
|
return cut; |
442 |
|
} |
443 |
|
} |