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UMBC High Performance Computing Facility
Please note that this page is under construction. We are documenting the 240-node cluster maya that will be available after Summer 2014. Currently, the 84-node cluster tara still operates independently, until it becomes part of maya at the end of Summer 2014. Please see the 2013 Resources Pages under the Resources tab for tara information.
A Density-Functional Theory Calculation of Copper Lattice Electronic Structure
Kristi Harris, Philip Rous, Markos Georganopoulos, Michael Hayden, Department of Physics

We will use the HPC cluster to perform electronic-structure calculations within density-functional theory using pseudopotentials and a plane-wave basis set. These calculations will be performed using the open-source code PWscf (Plane-Wave Self-Consistent Field, website: http://www.pwscf.org/home.htm). Using PWscf, the ground-state energy of a configuration of copper atoms in a fixed-volume supercell is obtained after structural optimization, that is, energy minimization of the atomic positions through force elimination. A supercell, in this case, is a collection of atoms in a periodic bulk or surface (slab) crystalline structure, with or without defects such as vacancies (empty lattice sites) or adatoms (adsorbed atoms on the surface). From the calculated energies of different supercells, we will determine the relative binding energy for a copper atom as a function of its coordination number (number of nearest neighbors in its crystal lattice). These binding energies will be used as inputs to a (separate) kinetic Monte Carlo simulation of copper nanowires.