Hybridization and Decay of Magnetic Excitations in two-dimensional Triangular Lattice Antiferromagnets

TL;DR

This paper reviews the complex interactions, hybridization, and decay phenomena of magnetic excitations in two-dimensional triangular lattice antiferromagnets, highlighting their significance in quantum magnetic systems.

Contribution

It provides a comprehensive review of unconventional magnetic excitations and their implications in 2D triangular lattice antiferromagnets, emphasizing phenomena like hybridization and decay.

Findings

Magnetic excitations exhibit hybridization and decay in 2D triangular lattices.

Anomalous features are prominent in quantum magnets with noncollinear structures.

Implications for understanding quantum magnetic behavior are discussed.

Abstract

Elementary quasiparticles in solids such as phonons and magnons occasionally have nontrivial interactions between them, as well as among themselves. As a result, their energy eigenvalues are renormalized, the quasiparticles spontaneously decay into a multi-particle continuum state, or they are hybridized with each other when their energies are close. As discussed in this review, such anomalous features can appear dominantly in quantum magnets but are not, a priori, negligible for magnetic systems with larger spin values and noncollinear magnetic structures. We review the unconventional magnetic excitations in two-dimensional triangular lattice antiferromagnets and discuss their implications on related issues.