A simulation study for the ground state configuration of the (F+ 2) center in NaF:Mg

In order to understand the room-temperature stability of the (F + 2 ) * -center laser, one must know its atomistic configuration, and be able to quantitatively estimate the energies of related configurations. In this study we develop an approach to simulating such defect complexes. The computed resu...

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Published in:Radiation effects and defects in solids 1998-07, Vol.145 (1-2), p.29-38
Main Authors: Vail, J. M., Bromirski, M., Emberly, E., Lu, T., Yang, Z., Pandey, R.
Format: Article
Language:English
Subjects:
Color centers
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Defect complexes
Electron states
Exact sciences and technology
Impurity and defect levels
Other nonmetals
Physics
Stable configurations
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container_title Radiation effects and defects in solids
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creator Vail, J. M.
Bromirski, M.
Emberly, E.
Lu, T.
Yang, Z.
Pandey, R.
description In order to understand the room-temperature stability of the (F + 2 ) * -center laser, one must know its atomistic configuration, and be able to quantitatively estimate the energies of related configurations. In this study we develop an approach to simulating such defect complexes. The computed results allow us to identify two configurations that are quite close (within 2eV) in energy as candidates for the ground state. We calculate spin densities for nearest neighbors of the F-type center for these two configurations, showing the difference in spin-density patterns in the two cases. We also present calculated nearest-neighbor atomic displacements from perfect crystal positions, all of which are ≤12%. Finally, we give a critique of the model and method upon which the simulation is based.
doi_str_mv 10.1080/10420159808220020
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subjects Color centers
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Defect complexes
Electron states
Exact sciences and technology
Impurity and defect levels
Other nonmetals
Physics
Stable configurations
title A simulation study for the ground state configuration of the (F+ 2) center in NaF:Mg
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