Transverse Spin current at the normal/p-wave magnet junctions

TL;DR

This paper studies how electrons transmit through a normal metal and p-wave magnet junction, revealing anisotropic spin-dependent transmission and the emergence of a transverse spin current, with implications for spintronic device design.

Contribution

It introduces a model for normal/p-wave magnet junctions, demonstrating anisotropic transmission, mirror symmetry in spin transport, and the role of the $eta$-vector in spin dynamics.

Findings

Transverse spin current flows parallel to the interface.

Transmission is angle-dependent and spin-dependent.

The $eta$-vector influences spin-density wave dynamics.

Abstract

We investigate the transmission properties of a junction between a normal metal and a p-wave magnet in the ballistic regime. We introduce a two-dimensional square lattice that confirms the p-wave magnet criteria. The $\alpha$-vector of the magnet breaks the inversion symmetry of the parabolic dispersion, shifting them in $k$-space. These shifts alter the propagation direction of fermions passing through the junction interface. Depending on spin orientation, the transmission process exhibits anisotropic, angle-dependent behavior. We also demonstrate a mirror symmetry between fermions with opposite spin directions, leading to the emergence of a transverse spin current that flows parallel to the interface. Additionally, we show that the $\alpha$-vector acts as a source for the dynamics of the spin-density wave and observe the formation of an indirect gap in the conductance of the junction. Our findings highlight the unique transmission characteristics and spin transport phenomena in normal metal/p-wave magnet junctions, paving the way for potential applications in spintronic devices.