...
首页> 外文期刊>Physical review >Shot noise induced by electron-nuclear spin-flip scattering in a nonequilibrium quantum wire
【24h】

Shot noise induced by electron-nuclear spin-flip scattering in a nonequilibrium quantum wire

机译:非平衡量子线中电子核自旋翻转散射引起的散粒噪声

获取原文
获取原文并翻译 | 示例
           

摘要

We study the shot noise (nonequilibrium current fluctuation) associated with dynamic nuclear polarization in a nonequilibrium quantum wire (QW) fabricated in a two-dimensional electron gas. We observe that the spin-polarized conductance quantization of the QW in the integer quantum Hall regime collapses when the QW is voltage biased to be driven to nonequilibrium. By measuring the shot noise, we prove that the spin polarization of electrons in the QW is reduced to ~0.7 instead of unity as a result of electron-nuclear spin-flip scattering. The result is supported by Knight shift measurements of the QW using resistively detected NMR.
机译:我们研究了在二维电子气中制造的非平衡量子线(QW)中与动态核极化相关的散粒噪声(非平衡电流波动)。我们观察到,当将QW偏置为驱动到非平衡状态时,整数量子霍尔机制中QW的自旋极化电导量化会崩溃。通过测量散粒噪声,我们证明了由于电子-核自旋翻转散射的结果,量子阱中电子的自旋极化减小到了〜0.7,而不是一。使用电阻检测的NMR对QW进行奈特位移的测量结果支持了该结果。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号