Band-asymmetry-driven nonreciprocal electronic transport in a helimagnetic semimetal α-EuP${}_3$

Abstract

Chiral magnetic textures give rise to unconventional magnetotransport phenomena such as the topological Hall effect and nonreciprocal electronic transport. While the correspondence between real-space magnetic topology/symmetry and such transport phenomena has been well established, a microscopic understanding based on the spin-dependent band structure in momentum space remains elusive. Here we demonstrate how a chiral magnetic structure in real space introduces an asymmetry in the electronic band structure and triggers a nonreciprocal electronic transport in a centrosymmetric helimagnet α-EuP${}_3$. The magnetic structure of α-EuP${}_3$ is highly tunable by a magnetic field and closely coupled to its semi-metallic electronic band structure, enabling a systematic study across chiral and achiral magnetic phases on the correspondence between nonreciprocal transport and electronic band asymmetry. Our findings reveal how a microscopic change in the magnetic configuration of charge carriers can lead to nonreciprocal electronic transport, paving the way for designing chiral magnets with desirable properties.

31 pages, 12 figures, 1 table

References in corpus (4)

• Supercurrent diode effect and finite momentum superconductivity
• A phenomenological theory of superconductor diodes
• Ubiquitous Superconducting Diode Effect in Superconductor Thin Films
• Theory of the supercurrent diode effect in Rashba superconductors with arbitrary disorder

Cited by in corpus (8)

• Coexistence of $p$-wave magnetism and superconductivity
• Nonreciprocal transport in a room-temperature chiral magnet
• The fate of $p$-wave spin polarization in helimagnets with Rashba spin-orbit coupling
• Proximity effect and p-wave superconductivity in s-wave superconductor/helimagnet heterostructures
• Field-driven band asymmetry and non-reciprocal transport in a helimagnet
• Enhanced Superconducting Diode Effect in the Asymmetric Hatsugai-Kohmoto Model
• Helimagnetic Josephson diode effect
• Riemannian geometric classification and emergent phenomena of magnetic textures