Joint Institute for Computational Sciences, University of Tennessee - Oak Ridge National Laboratory, Oak Ridge, Tennessee, United States of America , Department of Physics, University of Tennessee, Knoxville, Tennessee, United States of America.|Joint Institute for Computational Sciences, University of Tennessee - Oak Ridge National Laboratory, Oak Ridge, Tennessee, United States of America , Department of Physics, University of Tennessee, Knoxville, Tennessee, United States of America.|Joint Institute for Computational Sciences, University of Tennessee - Oak Ridge National Laboratory, Oak Ridge, Tennessee, United States of America , Department of Physics, University of Tennessee, Knoxville, Tennessee, United States of America.|Joint Institute for Computational Sciences, University of Tennessee - Oak Ridge National Laboratory, Oak Ridge, Tennessee, United States of America , Department of Physics, University of Tennessee, Knoxville, Tennessee, United States of America.|Joint Institute for Computational Sciences, University of Tennessee - Oak Ridge National Laboratory, Oak Ridge, Tennessee, United States of America , Department of Physics, University of Tennessee, Knoxville, Tennessee, United States of America.|Joint Institute for Computational Sciences, University of Tennessee - Oak Ridge National Laboratory, Oak Ridge, Tennessee, United States of America , Department of Physics, University of Tennessee, Knoxville, Tennessee, United States of America.|Joint Institute for Computational Sciences, University of Tennessee - Oak Ridge National Laboratory, Oak Ridge, Tennessee, United States of America , Department of Physics, University of Tennessee, Knoxville, Tennessee, United States of America.