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interactions:tersoff

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tersoff [2013/08/07 15:47] – created danieltersoff [2013/08/15 15:14] – add imd and lammps daniel
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 ~~NOTOC~~ ~~NOTOC~~
 ====== Tersoff Potentials ====== ====== Tersoff Potentials ======
 +----
  
-The Tersoff potential<sup>1</sup> is available when //potfit// is compiled with the  +<WRAP round alert> 
-''tersoff'' flag, which also implies the ''apot'' flag for analytic potentials.+Tersoff potentials are currently only available in the manybody branch of the git repository! 
 +They are not part of the latest release package. 
 +</WRAP> 
 + 
 +---- 
 + 
 +The Tersoff potential((J. Tersoff, //Phys. Rev. B// **39**, 5566 (1989) ))  
 +is available when //potfit// is compiled with the ''tersoff'' flag, which also implies  
 +the ''apot'' flag for analytic potentials.
  
 ===== Basic Theory ===== ===== Basic Theory =====
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 The total potential energy is defined as The total potential energy is defined as
  
-$$E_{\text{total}}=\frac{1}{2}\sum_{i,j}^{N}\Phi_{ij}\left(r_{ij}\right)=+$$E_{\text{total}}=
 \frac{1}{2}\sum_{i,j}f_c(r_{ij})\left(A_{ij}e^{-\lambda_{ij}r_{ij}}+b_{ij}B_{ij} \frac{1}{2}\sum_{i,j}f_c(r_{ij})\left(A_{ij}e^{-\lambda_{ij}r_{ij}}+b_{ij}B_{ij}
 e^{-\mu_{ij}r_{ij}}\right)$$ e^{-\mu_{ij}r_{ij}}\right)$$
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 ==== IMD output ==== ==== IMD output ====
 +
 +An analytic IMD potential which can be used with the ''tersoff2'' option of IMD is written to ''*.imd.tersoff.pot''.
 +This file, however, may not be used as a potential file for IMD. Instead, its contents need to be copied
 +INTO the IMD parameter file.
  
 ==== LAMMPS output ==== ==== LAMMPS output ====
  
------+The potential can also be written in LAMMPS format. The name of the output file is ''*.lammps.tersoff''
  
-1. J. Tersoff, //Phys. Rev. B// **39**, 5566 (1989) 
interactions/tersoff.txt · Last modified: 2018/01/06 10:39 by daniel