Non-Hermitian skin effect in magnetic systems

Abstract

Far from being limited to a trivial generalization of their Hermitian counterparts, non-Hermitian topological phases have gained widespread interest due to their unique properties. One of the most striking non-Hermitian phenomena is the skin effect, i.e., the localization of a macroscopic fraction of bulk eigenstates at a boundary, which underlies the breakdown of the bulk-edge correspondence. Here we investigate the emergence of the skin effect in magnetic insulating systems by developing a phenomenological approach to describing magnetic dissipation within a lattice model. Focusing on a spin-orbit-coupled van der Waals (vdW) ferromagnet with spin-nonconserving magnon-phonon interactions, we find that the magnetic skin effect emerges in an appropriate temperature regime. Our results suggest that the interference between Dzyaloshinskii-Moriya interaction (DMI) and nonlocal magnetic dissipation plays a key role in the accumulation of bulk states at the boundaries.

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Cited by in corpus (13)

• Topological Non-Hermitian skin effect
• Chirality as Generalized Spin-Orbit Interaction in Spintronics
• Perspective: non-Hermitian physics in magnetic systems
• Occupation-dependent particle separation in one-dimensional non-Hermitian lattices
• Dissipative Spin-wave Diode and Nonreciprocal Magnonic Amplifier
• Direction reversal of non-Hermitian skin effect via coherent coupling
• Exceptional points as signatures of dynamical magnetic phase transitions
• Topological transitions in dissipatively coupled Su-Schrieffer-Heeger models
• Non-Hermitian skin effect enforced by nonsymmorphic symmetries
• Multitude of exceptional points in van der Waals magnets
• Many-body critical non-Hermitian skin effect
• Exceptional second-order topological insulators
• Magnetic Control of the Non-Hermitian Skin Effect in Two-Dimensional Lattices