论文部分内容阅读
以A.Kobayashi等的半经验紧束缚模型和Hjalmarson-Vogh-Wolford-Dow深能级理论为基础,计算了Hg1-xCdxTe中阳离子位替代式杂质(包括N,O,C)与最近邻替代式杂质形成sp3键杂质对后阳离子位杂质A1对称性深能级的变化以及最近邻理想双空位(Vc,Va)的深能级。计算结果表明:阳离子位杂质A1能级的变化取决于与其配对杂质的电负性,杂质对a1能级组分依赖关系dE/dx小于阳离子位单杂质A1能级的dE/dx,大于阴离子位单杂质T2能级的dE/dx,不同杂质对的dE/dx基本相同;理想双空位(Vc,Va)在能隙或近能隙区域产生一个a1态深能级,该能级的dE/dx很小,对于CdTe,位置在0.5eV,对于x<0.37的Hg1-xCdxTe,该能级成为导带共振态。
With A. Kobayashi et al., And the Hjalmarson-Vogh-Wolford-Dow deep level theory, we calculated that intersubspectrum substitution (including N, O, C) and nearest neighbor substitutional impurities in Hg1-xCdxTe form sp3 The change in the symmetry of the postcational impurity A1 at the key impurity, and the deep level of the nearest neighbor ideal double vacancy (Vc, Va). The calculated results show that the energy level of cation A1 varies depending on the electronegativity of its paired impurities. The dependence of impurity on a1 energy level component dE / dx is smaller than the dE / dx of A1 level of cationic single impurity, DE / dx of single impurity T2 level and dE / dx of different impurity pairs are basically the same. The ideal double vacancy (Vc, Va) produces an a1 deep level in the energy gap or near gap, and the dE / dx is small, 0.5eV for CdTe and for Hg1-xCdxTe with x <0.37, this band becomes the conduction band resonance state.