CAJ | 학술논문

在(In,Ga)As缓冲层中生长的Ga<,0.95>Mn<,0.05>As薄膜的磁光圆二向色性(MCD)扫描磁场的测量中发现异常现象,这一现象出现在外磁场把样品的磁化矢量扭转到与入射光方向一致或远离入射光方向之时.通过磁各向异性的平均场理论,我们认为这实际上是磁各向异性对带-带跃迁影响的表现,是由于空穴带劈裂和E-k色散关系均与磁化方向相关而引起的.
재(In,Ga)As완충층중생장적Ga<,0.95>Mn<,0.05>As박막적자광원이향색성(MCD)소묘자장적측량중발현이상현상,저일현상출현재외자장파양품적자화시량뉴전도여입사광방향일치혹원리입사광방향지시.통과자각향이성적평균장이론,아문인위저실제상시자각향이성대대-대약천영향적표현,시유우공혈대벽렬화E-k색산관계균여자화방향상관이인기적.
Abnormal behaviors were observed in magnetic circular dichroism (MCD) in both as-grown and annealed Ga0.95 Mn0.05 As/InGaAs epilayer, as the direction of magnetization vector turns away from or toward the direction of incident beam by applying a magnetic field. Following the mean-field theory of magnetocrystalline anisotropy, it is found that the phenomena are actually the manifestation of the influence of the magnetic anisotropy on interband optical transitions due to the dependence of hole band splitting and warp of E-k dispersion relation on the magnetization orientation.