Shtrikman Hadas, Song Man Suk, Załuska-Kotur Magdalena A, Buczko Ryszard, Wang Xi, Kalisky Beena, Kacman Perla, Houben Lothar, Beidenkopf Haim
Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot 7610001, Israel.
Institute of Physics, Polish Academy of Sciences, Aleja Lotnikow 32/46, Warsaw PL-02-668, Poland.
Nano Lett. 2022 Nov 23;22(22):8925-8931. doi: 10.1021/acs.nanolett.2c03012. Epub 2022 Nov 7.
In the pursuit of magneto-electronic systems nonstoichiometric magnetic elements commonly introduce disorder and enhance magnetic scattering. We demonstrate the growth of (EuIn)As shells, with a unique crystal structure comprised of a dense net of Eu inversion planes, over InAs and InAsSb core nanowires. This is imaged with atomic and elemental resolution which reveal a prismatic configuration of the Eu planes. The results are supported by molecular dynamics simulations. Local magnetic and susceptibility mappings show magnetic response in all nanowires, while a subset bearing a DC signal points to ferromagnetic order. These provide a mechanism for enhancing Zeeman responses, operational at zero applied magnetic field. Such properties suggest that the obtained structures can serve as a preferred platform for time-reversal symmetry broken one-dimensional states including intrinsic topological superconductivity.
在追求磁电系统的过程中，非化学计量比的磁性元素通常会引入无序并增强磁散射。我们展示了在InAs和InAsSb核心纳米线上生长具有独特晶体结构的（EuIn）As壳层，该结构由Eu反演平面的密集网络组成。这通过原子和元素分辨率成像得以揭示Eu平面的棱柱形配置。结果得到了分子动力学模拟的支持。局部磁性和磁化率映射显示所有纳米线都有磁响应，而带有直流信号的子集则指向铁磁序。这些为增强塞曼响应提供了一种机制，在零外加磁场下即可运行。这些特性表明，所获得的结构可作为时间反演对称性破缺的一维态（包括本征拓扑超导）的首选平台。
