Hg1-xMnxTe的光学性质研究

根据Hg1-xMnxTe的光学吸收光谱，用Kana模型详细分析了重空穴和导带间的直接跃迁导致的本征光吸收。研究表明当光吸收系数α<103 cm-1时，在导带中没有出现从抛物线色散规律引起的偏离，因而保证了Hg1-xMnxTe带宽的精确确定。     

Whistler-Mode Waves Growth by a Generalized Relativistic Kappa-Type Distribution

The instability of field-aligned Whistler-mode waves in space plasmas is studied by using a recently developed generalized relativistic kappa-type （KT） distribution. Numerical calculations are performed for a direct comparison between the new KT distribution and the current kappa distribution. We show that the wave growth for the KT distribution tends to occur in the lower wave frequency （e.g.,ω 〈~0.1Ω） due to a larger fractional number of the resonant electrons ηrel （which controls the wave growth）, while primarily locating in the higher wave frequency for the kappa distribution. Moreover, the relativistic anisotropy Are1 by the KT distribution is found to be smaller than that by the kappa distribution, leading to a smaller peak of wave growth. The results present a further understanding of plasma wave instability particularly in those plasmas where relativistic electrons are present.