Two-temperature model for electronic heat conduction

Work by Carolyn Phillips (U Michigan) and Paul Crozier (Sandia) to add a two-temperature model to LAMMPS so that the effect of electronic heat conduction can be included in a classical MD atomic simulation. Including these effects strongly influences the rate and extent of annealing in LJ crystals. The new fix was tested on a single-component LJ crystal that easily recrystallizes and on a binary glass-forming LJ crystal that tends to retain permanent damage, across a range of electron-ion coupling parameter values and electronic thermal conductivity values.

The doc page for the fix ttm command has further details.