带电绝缘线周围电子自旋极化的电子全息观测。

Electron holography observation of electron spin polarization around charged insulating wire.

作者信息

Sato Takafumi, Shimada Keiko, Akase Zentaro, Magara Hideyuki, Tomita Takeshi, Shindo Daisuke

机构信息

Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan.

RIKEN Center for Emergent Matter Science (CEMS), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.

出版信息

Microscopy (Oxf). 2024 Jul 30;73(4):367-375. doi: 10.1093/jmicro/dfad056.

DOI:10.1093/jmicro/dfad056

PMID:37952124

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11288191/

Abstract

We report direct observation by electron holography of the spin polarization of electrons in a vacuum region around a charged SiO2 wire coated with Pt-Pd. Irradiating the SiO2 wire with 300 keV electrons caused the wire to become positively charged due to the emission of secondary electrons. The spin polarization of these electrons interacting with the charged wire was observed in situ using a phase reconstruction process under an external magnetic field. The magnetic field of the spin-polarized electrons was simulated taking into account the distribution of secondary electrons and the effect of the external magnetic field.

摘要

我们报告了通过电子全息术对涂有铂 - 钯的带电二氧化硅线周围真空区域中电子的自旋极化进行的直接观察。用300 keV电子辐照二氧化硅线会因二次电子发射而使线带正电。在外部磁场下，利用相位重建过程原位观察了这些与带电线相互作用的电子的自旋极化。考虑二次电子分布和外部磁场的影响，对自旋极化电子的磁场进行了模拟。