[8] Research supported by ORNL's Center for Nanophase Materials Sciences, which is a U.S. Department of Energy Office of Science User Facility (J.C.I. and R.R.U.), and by the Materials Sciences and Engineering Division Office of Basic Energy Sciences, U.S. Department of Energy (A.R.L.). This research used resources of the National Energy Research Scientific Computing Center, which is supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231, and instrumentation within ORNL's Materials Characterization Core provided by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. This work used the Extreme Science and Engineering Discovery Environment (XSEDE). Theoretical work at Vanderbilt University was supported by DOE Award No. DE-FG02-09ER46554 and by the McMinn Endowment (T.L.F. and S.T.P.).
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