Commit 24e41bc0 authored by Mingjian Wen's avatar Mingjian Wen
Browse files

Update doc and examples due to the change of parameters

parent 4c19eab6
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+10 −8
Original line number Diff line number Diff line
@@ -33,8 +33,8 @@ pair_coeff * * rebo CH.airebo C H :pre

Style {drip} computes the interlayer interactions of layered materials using
the dihedral-angle-corrected registry-dependent (DRIP) potential as described
in "(Wen)"_#Wen1, which is based on the "(Kolmogorov)"_#Kolmogorov1 potential
and provides an improvded prediction for forces.
in "(Wen)"_#Wen2018, which is based on the "(Kolmogorov)"_#Kolmogorov2005
potential and provides an improvded prediction for forces.
The total potential energy of a system is

:c,image(Eqs/pair_drip.jpg)
@@ -88,9 +88,10 @@ pair_style hybrid/overlay drip rebo
pair_coeff * * drip  C.drip     C NULL
pair_coeff * * rebo  CH.airebo  C H :pre

NOTE: The parameter file developed in "(Wen)"_#Wen1 is provided with LAMMPS (see
the "potentials" directory).

NOTE: The potential parameters developed in "(Wen)"_#Wen2018 are provided with
LAMMPS (see the "potentials" directory). Besides those in "Wen"_#Wen2018, an
additional parameter "normal_cutoff", specific to the LAMMPS implementation, is
used to find the three nearest neighbors of an atom to construct the normal.


:line
@@ -131,9 +132,10 @@ simulation doesn't use "metal" units.

:line

:link(Wen1)
[(Wen)] M. Wen, S. Carr, S. Fang, E. Kaxiras, and E. B. Tadmor, Phys. Rev. B, 98, 235404 (2018)
:link(Wen2018)
[(Wen)] M. Wen, S. Carr, S. Fang, E. Kaxiras, and E. B. Tadmor, Phys. Rev. B,
98, 235404 (2018)

:link(Kolmogorov1)
:link(Kolmogorov2005)
[(Kolmogorov)] A. N. Kolmogorov, V. H. Crespi, Phys. Rev. B 71, 235415 (2005)
+7 −3
Original line number Diff line number Diff line
@@ -6,10 +6,14 @@
# Cite as M. Wen, S. Carr, S. Fang, E. Kaxiras, and E. B. Tadmor, Phys. Rev. B, 98, 235404 (2018).


#        C0           C2          C4          C         delta     lambda     A         z0       B        eta   rho_cut r_cut
C  C  1.1598e-02  1.2981e-02  3.2515e-02  7.8151e-03  8.3679e-01  2.7158  2.2216e-02  3.34  7.6799e-03  1.1432  1.562  12.0
#        C0           C2          C4          C         delta     lambda     A        z0       B         eta  rho_cut r_cut normal_cut
C  C  1.1598e-02  1.2981e-02  3.2515e-02  7.8151e-03  8.3679e-01  2.7158  2.2216e-02  3.34  7.6799e-03  1.1432  1.562  12.0  3.7


# C0, C2, C4, C, A, and B in [eV]
# delta, z0, eta, rho_cut, and r_cut in [Angstrom]
# delta, z0, eta, rho_cut, r_cut, and normal_cut in [Angstrom]
# lambda in [1/Angstrom]
#
# "normal_cut" is a parameter not present in the Wen paper, but specific to the
# LAMMPS implementation, which is used to find the 3 nearest neighbors of an
# atom to construct the normal.
+25 −25
Original line number Diff line number Diff line
@@ -16,8 +16,8 @@ read_data data.CH
  0 = max # of 1-3 neighbors
  0 = max # of 1-4 neighbors
  1 = max # of special neighbors
  special bonds CPU = 0.000135899 secs
  read_data CPU = 0.00296116 secs
  special bonds CPU = 0.000221014 secs
  read_data CPU = 0.00603986 secs


# potential
@@ -44,9 +44,9 @@ WARNING: Using 'neigh_modify every 1 delay 0 check yes' setting during minimizat
Neighbor list info ...
  update every 1 steps, delay 0 steps, check yes
  max neighbors/atom: 2000, page size: 100000
  master list distance cutoff = 14
  ghost atom cutoff = 14
  binsize = 7, bins = 6 4 1
  master list distance cutoff = 17.7
  ghost atom cutoff = 17.7
  binsize = 8.85, bins = 5 3 1
  2 neighbor lists, perpetual/occasional/extra = 2 0 0
  (1) pair drip, perpetual, skip from (2)
      attributes: full, newton on, ghost
@@ -58,52 +58,52 @@ Neighbor list info ...
      pair build: full/bin/ghost
      stencil: full/ghost/bin/3d
      bin: standard
Per MPI rank memory allocation (min/avg/max) = 11.71 | 11.71 | 11.71 Mbytes
Per MPI rank memory allocation (min/avg/max) = 12.92 | 12.92 | 12.92 Mbytes
Step Temp E_pair E_mol TotEng Press Volume 
       0            0   -2883.1071            0   -2883.1071    366130.38    2779.5956 
      10            0   -3229.1892            0   -3229.1892   -19780.166    2779.5956 
      20            0   -3268.3574            0   -3268.3574   -15169.468    2779.5956 
      30            0    -3270.013            0    -3270.013   -19827.419    2779.5956 
      40            0   -3270.1341            0   -3270.1341   -20652.573    2779.5956 
      50            0   -3270.2612            0   -3270.2612   -22644.203    2779.5956 
      57            0   -3270.2821            0   -3270.2821    -23259.55    2779.5956 
Loop time of 2.88099 on 1 procs for 57 steps with 545 atoms
      40            0   -3270.1341            0   -3270.1341   -20652.569    2779.5956 
      50            0   -3270.2612            0   -3270.2612   -22644.747    2779.5956 
      57            0   -3270.2819            0   -3270.2819   -23254.995    2779.5956 
Loop time of 3.06624 on 1 procs for 57 steps with 545 atoms

99.0% CPU use with 1 MPI tasks x no OpenMP threads
99.3% CPU use with 1 MPI tasks x no OpenMP threads

Minimization stats:
  Stopping criterion = max force evaluations
  Energy initial, next-to-last, final = 
        -2883.10712045     -3270.28053776     -3270.28206154
  Force two-norm initial, final = 114.766 0.235923
  Force max component initial, final = 12.0195 0.0426664
  Final line search alpha, max atom move = 1 0.0426664
        -2883.10712045     -3270.28039929     -3270.28192718
  Force two-norm initial, final = 114.766 0.235428
  Force max component initial, final = 12.0195 0.0484347
  Final line search alpha, max atom move = 1 0.0484347
  Iterations, force evaluations = 57 101

MPI task timing breakdown:
Section |  min time  |  avg time  |  max time  |%varavg| %total
---------------------------------------------------------------
Pair    | 2.8692     | 2.8692     | 2.8692     |   0.0 | 99.59
Bond    | 3.5524e-05 | 3.5524e-05 | 3.5524e-05 |   0.0 |  0.00
Pair    | 3.0539     | 3.0539     | 3.0539     |   0.0 | 99.60
Bond    | 4.1485e-05 | 4.1485e-05 | 4.1485e-05 |   0.0 |  0.00
Neigh   | 0          | 0          | 0          |   0.0 |  0.00
Comm    | 0.0014327  | 0.0014327  | 0.0014327  |   0.0 |  0.05
Output  | 0.0069089  | 0.0069089  | 0.0069089  |   0.0 |  0.24
Comm    | 0.0019863  | 0.0019863  | 0.0019863  |   0.0 |  0.06
Output  | 0.0070152  | 0.0070152  | 0.0070152  |   0.0 |  0.23
Modify  | 0          | 0          | 0          |   0.0 |  0.00
Other   |            | 0.003388   |            |       |  0.12
Other   |            | 0.003321   |            |       |  0.11

Nlocal:    545 ave 545 max 545 min
Histogram: 1 0 0 0 0 0 0 0 0 0
Nghost:    2346 ave 2346 max 2346 min
Nghost:    3175 ave 3175 max 3175 min
Histogram: 1 0 0 0 0 0 0 0 0 0
Neighs:    0 ave 0 max 0 min
Histogram: 1 0 0 0 0 0 0 0 0 0
FullNghs:  180462 ave 180462 max 180462 min
FullNghs:  294122 ave 294122 max 294122 min
Histogram: 1 0 0 0 0 0 0 0 0 0

Total # of neighbors = 180462
Ave neighs/atom = 331.123
Total # of neighbors = 294122
Ave neighs/atom = 539.673
Ave special neighs/atom = 0
Neighbor list builds = 0
Dangerous builds = 0

Total wall time: 0:00:02
Total wall time: 0:00:03
+17 −17
Original line number Diff line number Diff line
@@ -16,8 +16,8 @@ read_data data.C
  0 = max # of 1-3 neighbors
  0 = max # of 1-4 neighbors
  1 = max # of special neighbors
  special bonds CPU = 0.000100136 secs
  read_data CPU = 0.00110912 secs
  special bonds CPU = 0.000164032 secs
  read_data CPU = 0.00137401 secs


# potential
@@ -43,9 +43,9 @@ WARNING: Using 'neigh_modify every 1 delay 0 check yes' setting during minimizat
Neighbor list info ...
  update every 1 steps, delay 0 steps, check yes
  max neighbors/atom: 2000, page size: 100000
  master list distance cutoff = 14
  ghost atom cutoff = 14
  binsize = 7, bins = 6 4 1
  master list distance cutoff = 17.7
  ghost atom cutoff = 17.7
  binsize = 8.85, bins = 5 3 1
  2 neighbor lists, perpetual/occasional/extra = 2 0 0
  (1) pair drip, perpetual
      attributes: full, newton on, ghost
@@ -57,7 +57,7 @@ Neighbor list info ...
      pair build: copy
      stencil: none
      bin: none
Per MPI rank memory allocation (min/avg/max) = 11.4 | 11.4 | 11.4 Mbytes
Per MPI rank memory allocation (min/avg/max) = 12.21 | 12.21 | 12.21 Mbytes
Step Temp E_pair E_mol TotEng Press Volume 
       0            0   -2941.0549            0   -2941.0549   -52204.715    2052.0534 
      10            0   -2966.9787            0   -2966.9787    -29717.01    2052.0534 
@@ -66,9 +66,9 @@ Step Temp E_pair E_mol TotEng Press Volume
      40            0   -2967.0888            0   -2967.0888   -29997.486    2052.0534 
      50            0   -2967.0896            0   -2967.0896   -30072.387    2052.0534 
      51            0   -2967.0896            0   -2967.0896   -30076.548    2052.0534 
Loop time of 2.8619 on 1 procs for 51 steps with 400 atoms
Loop time of 2.89944 on 1 procs for 51 steps with 400 atoms

98.9% CPU use with 1 MPI tasks x no OpenMP threads
99.6% CPU use with 1 MPI tasks x no OpenMP threads

Minimization stats:
  Stopping criterion = max force evaluations
@@ -82,25 +82,25 @@ Minimization stats:
MPI task timing breakdown:
Section |  min time  |  avg time  |  max time  |%varavg| %total
---------------------------------------------------------------
Pair    | 2.8529     | 2.8529     | 2.8529     |   0.0 | 99.69
Bond    | 3.314e-05  | 3.314e-05  | 3.314e-05  |   0.0 |  0.00
Pair    | 2.8899     | 2.8899     | 2.8899     |   0.0 | 99.67
Bond    | 3.171e-05  | 3.171e-05  | 3.171e-05  |   0.0 |  0.00
Neigh   | 0          | 0          | 0          |   0.0 |  0.00
Comm    | 0.0010927  | 0.0010927  | 0.0010927  |   0.0 |  0.04
Output  | 0.0053217  | 0.0053217  | 0.0053217  |   0.0 |  0.19
Comm    | 0.001483   | 0.001483   | 0.001483   |   0.0 |  0.05
Output  | 0.0055339  | 0.0055339  | 0.0055339  |   0.0 |  0.19
Modify  | 0          | 0          | 0          |   0.0 |  0.00
Other   |            | 0.002526   |            |       |  0.09
Other   |            | 0.002449   |            |       |  0.08

Nlocal:    400 ave 400 max 400 min
Histogram: 1 0 0 0 0 0 0 0 0 0
Nghost:    1716 ave 1716 max 1716 min
Nghost:    2357 ave 2357 max 2357 min
Histogram: 1 0 0 0 0 0 0 0 0 0
Neighs:    0 ave 0 max 0 min
Histogram: 1 0 0 0 0 0 0 0 0 0
FullNghs:  180462 ave 180462 max 180462 min
FullNghs:  294122 ave 294122 max 294122 min
Histogram: 1 0 0 0 0 0 0 0 0 0

Total # of neighbors = 180462
Ave neighs/atom = 451.155
Total # of neighbors = 294122
Ave neighs/atom = 735.305
Ave special neighs/atom = 0
Neighbor list builds = 0
Dangerous builds = 0
+2 −1
Original line number Diff line number Diff line
@@ -700,7 +700,8 @@ void PairDRIP::find_nearest3neigh()
    // store neighbors to be used later to compute normal
    if (nb3_rsq >= 1.0e10) {
      if (i<inum) {
        error->one(FLERR, "No enough neighbors to construct normal.");
        error->one(FLERR, "No enough neighbors to construct normal. Check the "
        "configuration to see whether atoms fly away.");
      } else {
        // This only happens for ghost atoms that are near the boundary of the
        // domain (i.e. r > r_cut + n_cut). These ghost atoms will not be