γ-Si_3N_4 is a nitrogen-based ultra-hard ceramic with Si atoms occupying both tetrahedral and octahedral sites in a spinel structure.Based on first-principles calculations,we investigate spin-polarized electronic structures and energetic stabilities of oxygenvacancy complex center(V_(Si)O_N) consisting of a substituted oxygen atom and an adjacent tetrahedrally coordinated silicon vacancy in spinel silicon nitride(γ-Si_3N_4) with different charge states.We find that the negatively charged V_(Si)O_N~(-1) cent...
【基金】
国家杰出青年科学基金(61425004)
【更新日期】
2017-05-11
【分类号】
O469
【正文快照】
0Introduction
The negatively charged nitrogen-vacancy center(NV_1 center)in diamond has attracted
a great deal of interest because it is the system of choice in many quantum technology applications including quantum key distribution[1_2],implementation
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