Giant effective g-factor in PbxEu1−xTe epitaxial films
Giant effective g-factor in PbxEu1−xTe epitaxial films
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DOI：
10.1063/1.2961018
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发表时间：
2008-07
影响因子：
4
通讯作者：
E. Heredia;P. Rappl;P. Motisuke;A. Gazoto;F. Iikawa;M. Brasil
中科院分区：
文献类型：
--
作者：
E. Heredia;P. Rappl;P. Motisuke;A. Gazoto;F. Iikawa;M. Brasil
我们用磁光测量的方法研究了PbxEu1−xTe薄膜，x⩽为0.2.对于x∼0.01EuTe薄膜的光发射类似于高质量的EuTe薄膜，其两条窄线归因于与磁极化子相关的激子复合。随着x的增加，发射由更宽的低能带主导，与二元发射相比，这是非常有效的。三元薄膜的磁光性质与EuTe的结果有许多相似之处，例如在相似的温度和磁场下的猝灭。最值得注意的是，它们还提供了一个巨大的有效g因子，使这种材料成为自旋电子应用的有力候选者。
We investigated PbxEu1−xTe films with x⩽0.2 by magneto-optical measurements. For x∼0.01, the optical emission is similar to high quality EuTe films with two narrow lines attributed to excitonic recombinations associated with magnetic polarons. For increasing x, the emission becomes dominated by a broader lower energy band, which is very efficient as compared to the binary emission. The magneto-optical properties of the ternary films show various similarities with EuTe results, such as quenchings at similar temperatures and magnetic fields. Most remarkably, they also present a giant effective g-factor that makes this material a strong candidate for spintronic applications.