The distinctions between the electrical conductivities under non-contact and contact current excitation in spin-split two-dimensional conductors

TL;DR

This paper investigates how non-contact current excitation in spin-split two-dimensional conductors introduces unique resistivity mechanisms due to inhomogeneous polarization, contrasting with contact excitation effects.

Contribution

It reveals that electron-electron scattering contributes to resistance under non-contact excitation, highlighting new resistivity mechanisms caused by spatial inhomogeneity.

Findings

Electron-electron scattering increases resistance in non-contact excitation.

Non-contact excitation causes spatially inhomogeneous polarization.

Distinct resistivity mechanisms are identified compared to contact excitation.

Abstract

It is shown that the normal electron-electron scattering is a source of electrical resistance on non-contact current excitation in two-dimensional spin-split electron systems. In contrast to the contact current injection, non-contact current excitation causes spatially inhomogeneous polarization in a two-dimensional conductor leading to new resistivity mechanisms.