论文标题
PB1-XSNXSE拓扑量井的完全扩散状态以外的弱抗钙化
Weak antilocalization beyond the fully diffusive regime in Pb1-xSnxSe topological quantum wells
论文作者
论文摘要
我们报告了在弹性散射长度大于磁性长度大的新方案中PB1-XSNXSE拓扑量子井中弱抗反转（WAL）的测量和分析。我们通过发展高质量外观和拓扑结晶绝缘子（TCI）量子井的兴奋剂来实现这一方案。我们获得超过100nm并与磁长度相当的弹性散射长度。在这种运输方式中，Hikami-Larkin-Nagaoka模型不再有效。我们采用Wittmann和Schmid的模型来从磁势中提取相干时间。我们发现，尽管具有改善的运输特性，但连贯时间可能会受到非强载体依赖性（例如电子波或缺陷散射）的散射通道的限制。
We report the measurements and analysis of weak antilocalization (WAL) in Pb1-xSnxSe topological quantum wells in a new regime where the elastic scattering length is larger than the magnetic length. We achieve this regime through the development of high-quality epitaxy and doping of topological crystalline insulator (TCI) quantum wells. We obtain elastic scattering lengths that exceeds 100nm and become comparable to the magnetic length. In this transport regime, the Hikami-Larkin-Nagaoka model is no longer valid. We employ the model of Wittmann and Schmid to extract the coherence time from the magnetoresistance. We find that despite our improved transport characteristics, the coherence time may be limited by scattering channels that are not strongly carrier dependent, such as electron-phonon or defect scattering.
