Hybridization and decay of magnetic excitations in two-dimensional triangular lattice antiferromagnets

Taehun Kim, Kisoo Park, Jonathan C. Leiner, Je Geun Park

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

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.

Original languageEnglish
Article number081003
JournalJournal of the Physical Society of Japan
Volume88
Issue number8
DOIs
StatePublished - 2019
Externally publishedYes

Funding

We thank Joosung Oh for fruitful discussions and acknowledge Pyeongjae Park and Kyungsoo Kim for their useful comments. We would also like to acknowledge Sasha Chernyshev and Pavel Maksimov for their careful reading and comments. The work at the IBS (Institute for Basic Science) CCES (Center for Correlated Electron System) was supported by the research program of IBS (IBS-R009-G1).

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