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首页> 外文期刊>Physical review >Proximity effects in a spin-triplet superconductor-ferromagnet heterostucture with a spin-active interface
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Proximity effects in a spin-triplet superconductor-ferromagnet heterostucture with a spin-active interface

机译：具有自旋-活动界面的自旋三重态超导体-铁磁体异质结构中的邻近效应

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摘要

We study the physical properties of a ballistic heterostructure made of a ferromagnet (FM) and a spin-triplet superconductor (TSC) with a layered structure stacking along the direction perpendicular to the planes where a chiral p_x + ip_y pairing occurs and assuming spin-dependent processes at the interface. We use a self-consistent Bogoliubov-de Gennes approach on a three-dimensional lattice to obtain the spatial profiles of the pairing amplitude and the magnetization. We find that, depending on the strength of the ferromagnetic exchange field, the ground state of the system can have two distinct configurations, with a parallel or antiparallel collinearity between the magnetic moments in the bulk and at the interface. We demonstrate that a magnetic state having noncoplanar interface, bulk, and Cooper pairs spins may be stabilized if the bulk magnetization is assumed to be fixed along a given direction. The study of the density of states reveals that the modification of the electronic spectrum in the FM plays an important role in the setting of the optimal magnetic configuration. Finally, we find the existence of induced spin-polarized pair correlations in the FM-TSC system.
机译：我们研究了由铁磁体（FM）和自旋三重态超导体（TSC）构成的弹道异质结构的物理性质，该结构沿垂直于手性p_x + ip_y配对发生并假设自旋相关的平面的方向堆叠的分层结构接口上的进程。我们在三维晶格上使用自洽Bogoliubov-de Gennes方法获得配对振幅和磁化强度的空间分布。我们发现，根据铁磁交换场的强度，系统的基态可以具有两种不同的配置，在主体中和界面处的磁矩之间具有平行或反平行共线性。我们证明，如果假定大块磁化强度沿给定方向固定，则具有非共面界面，块体和库珀对自旋的磁态可以稳定。对状态密度的研究表明，FM中电子光谱的修改在设置最佳磁性配置中起着重要作用。最后，我们发现在FM-TSC系统中存在诱导的自旋极化对相关。

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