1 "LAMMPS WWW Site"_lws - "LAMMPS Documentation"_ld - "LAMMPS Commands"_lc :c
3 :link(lws,http://lammps.sandia.gov)
5 :link(lc,Section_commands.html#comm)
9 pair_style lcbop command :h3
18 pair_coeff * * ../potentials/C.lcbop C :pre
22 The {lcbop} pair style computes the long-range bond-order potential
23 for carbon (LCBOP) of "(Los and Fasolino)"_#Los. See section II in
24 that paper for the analytic equations associated with the potential.
26 Only a single pair_coeff command is used with the {lcbop} style which
27 specifies an LCBOP potential file with parameters for specific
28 elements. These are mapped to LAMMPS atom types by specifying N
29 additional arguments after the filename in the pair_coeff command,
30 where N is the number of LAMMPS atom types:
33 N element names = mapping of LCBOP elements to atom types :ul
35 See the "pair_coeff"_pair_coeff.html doc page for alternate ways
36 to specify the path for the potential file.
38 As an example, if your LAMMPS simulation has 4 atom types and you want
39 the 1st 3 to be C you would use the following pair_coeff command:
41 pair_coeff * * C.lcbop C C C NULL :pre
43 The 1st 2 arguments must be * * so as to span all LAMMPS atom types.
44 The first C argument maps LAMMPS atom type 1 to the C element in the
45 LCBOP file. If a mapping value is specified as NULL, the mapping is
46 not performed. This can be used when a {lcbop} potential is used as
47 part of the {hybrid} pair style. The NULL values are placeholders for
48 atom types that will be used with other potentials.
50 The parameters/coefficients for the LCBOP potential as applied to C
51 are listed in the C.lcbop file to agree with the original "(Los and
52 Fasolino)"_#Los paper. Thus the parameters are specific to this
53 potential and the way it was fit, so modifying the file should be done
58 [Mixing, shift, table, tail correction, restart, rRESPA info]:
60 This pair style does not support the "pair_modify"_pair_modify.html
61 mix, shift, table, and tail options.
63 This pair style does not write its information to "binary restart
64 files"_restart.html, since it is stored in potential files. Thus, you
65 need to re-specify the pair_style and pair_coeff commands in an input
66 script that reads a restart file.
68 This pair style can only be used via the {pair} keyword of the
69 "run_style respa"_run_style.html command. It does not support the
70 {inner}, {middle}, {outer} keywords.
74 This pair styles is part of the MANYBODY package. It is only enabled
75 if LAMMPS was built with that package. See
76 the "Making LAMMPS"_Section_start.html#start_3 section for more info.
78 This pair potential requires the "newton"_newton.html setting to be
79 "on" for pair interactions.
81 The C.lcbop potential file provided with LAMMPS (see the potentials
82 directory) is parameterized for metal "units"_units.html. You can use
83 the LCBOP potential with any LAMMPS units, but you would need to
84 create your own LCBOP potential file with coefficients listed in the
85 appropriate units if your simulation doesn't use "metal" units.
89 "pair_airebo"_pair_airebo.html, "pair_coeff"_pair_coeff.html
96 [(Los and Fasolino)] J. H. Los and A. Fasolino, Phys. Rev. B 68, 024107