Topological thermal Hall effect of magnons in magnetic skyrmion lattice

Akazawa, Masatoshi; Lee, Hyun-Yong; Takeda, Hikaru; Fujima, Yuri; Tokunaga, Yusuke; Arima, T.; Han, Jung Hoon; Yamashita, Minoru

doi:10.1103/physrevresearch.4.043085

Cited by 16 publications

(5 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The spin-wave calculation for Néel type (ferro)-SkL on a triangular lattice is performed for a model with Heisenberg and DM interactions and single-ion uniaxial anisotropy 35 – 37 , while they did not consider the transport properties. The thermal Hall effect observed in the ferromagnetic Néel SkL in GaV 4 Se 8 is studied by the phenomenological U(1) gauge theory, showing a good agreement with the experimental data 22 . However, their Chern number and the Berry curvature contradict those of the spin-wave theory.…”

Section: Resultssupporting

confidence: 68%

“…For this reason, the positive magnetothermal conductivity observed at T < T N in decreasing the gap inside the helical phase is the feature attributed to an increase of . In the AFM-SkL phase, κ x x shows a slight decrease, which should be because of the re-opening of the magnon gap, in addition to a decrease of by the extra scattering effect of phonons by magnetic skyrmions as suggested in the case of ferro-SkL in GaV 4 Se 8 22 .…”

Section: Resultsmentioning

confidence: 81%

“…Indeed, the importance of dealing with precise spin-wave magnon bands derived from the individual spin Hamiltonian is clear even for the simple ferromagnetic Néel SkL phase of GaV 4 Se 8 22 . Although the phenomenological U(1) gauge theory gives κ x y in good agreement with the experimental data, the corresponding Chern number contradicts those obtained by the spin-wave theory 35 , 36 at the lowest two magnon bands.…”

Section: Discussionmentioning

confidence: 99%

“…Theories showed that the antisymmetric Dzyaloshinskii–Moriya (DM) spin exchange interactions or non-coplanar structures of ordered moments can be represented by the gauge field that bears the Berry curvature in the magnon bands 18 – 21 . Furthermore, in the insulating versions of skyrmions, GaV 4 Se 8 22 , the magnon thermal Hall effect is explained by the U(1) gauge field 23 similarly to the cases of metallic skyrmions.…”

Section: Introductionmentioning

confidence: 94%

See 3 more Smart Citations

Magnon thermal Hall effect via emergent SU(3) flux on the antiferromagnetic skyrmion lattice

Takeda,

Kawano,

Tamura

et al. 2024

Nat Commun

Self Cite

View full text Add to dashboard Cite

Complexity of quantum phases of matter is often understood theoretically by using gauge structures, as is recognized by the $${{\mathbb{Z}}}_{2}$$ Z 2 and U(1) gauge theory description of spin liquids in frustrated magnets. Anomalous Hall effect of conducting electrons can intrinsically arise from a U(1) gauge expressing the spatial modulation of ferromagnetic moments or from an SU(2) gauge representing the spin-orbit coupling effect. Similarly, in insulating ferro and antiferromagnets, the magnon contribution to anomalous transports is explained in terms of U(1) and SU(2) fluxes present in the ordered magnetic structure. Here, we report thermal Hall measurements of MnSc2S4 in an applied field up to 14 T, for which we consider an emergent higher rank SU(3) flux, controlling the magnon transport. The thermal Hall coefficient takes a substantial value when the material enters a three-sublattice antiferromagnetic skyrmion phase, which is in agreement with the linear spin-wave theory. In our description, magnons are dressed with SU(3) gauge field, which is a mixture of three species of U(1) gauge fields originating from the slowly varying magnetic moments on these sublattices.

show abstract

Section: Resultssupporting

confidence: 68%

Section: Resultsmentioning

confidence: 81%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 94%

See 2 more Smart Citations

Magnon thermal Hall effect via emergent SU(3) flux on the antiferromagnetic skyrmion lattice

Takeda,

Kawano,

Tamura

et al. 2024

Nat Commun

Self Cite

View full text Add to dashboard Cite

show abstract

“…In recent years, researchers have begun to pay attention to the magnon excitations in the skyrmion [6]. The topological magnons in ferromagnetic and anti-ferromagnetic skyrmion crystals have been discovered [42][43][44][45][46][47][48], and the topological phase transitions caused by the interactions or magnetic field are discussed as well [44,45]. However, as far as we know, in previous works, researchers mainly involved the skyrmions in noncentrosymmetric magnets which are formed with the help of chiral Dzyaloshinskii-Moriya interaction.…”

Section: Introductionmentioning

confidence: 99%

Topological magnons in a non-coplanar magnetic order on the triangular lattice

Bai,

Chen

2024

Phys. Scr.

View full text Add to dashboard Cite

The bond-dependent Kitaev interaction K is familiar in the effective spin model of transitionmetal compounds with octahedral ligands. In this work, we find a peculiar non-coplanar magneticorder can be formed with the help of K and next-nearest neighbor Heisenberg coupling J2 on thetriangular lattice. It can be seen as a miniature version of skyrmion crystal, since it has nine spinsand an integer topological number in a magnetic unit cell. The magnon excitations in such an orderare studied by the linear spin-wave theory. Of note is that the change in the relative size of J2 and Kproduces topological magnon phase transitions although the topological number remains unchanged.We also calculated the experimentally observable thermal Hall conductivity, and found that the signsof thermal Hall conductivity will change with topological phase transitions or temperature changes incertain regions.

show abstract

Topological Phases in Magnonics

Zhuo,

Kang,

Manchon

et al. 2023

Advanced Physics Research

View full text Add to dashboard Cite

Magnonics or magnon spintronics is an emerging field focusing on generating, detecting, and manipulating magnons. As charge‐neutral quasi‐particles, magnons are promising information carriers because of their low energy dissipation and long coherence length. In the past decade, topological phases in magnonics have attracted intensive attention due to their fundamental importance in condensed‐matter physics and potential applications of spintronic devices. In this review, we mainly focus on recent progress in topological magnonics, such as the Hall effect of magnons, magnon Chern insulators, topological magnon semimetals, etc. In addition, the evidence supporting topological phases in magnonics and candidate materials are also discussed and summarized. The aim of this review is to provide readers with a comprehensive and systematic understanding of the recent developments in topological magnonics.

show abstract

Topological thermal Hall effect of magnons in magnetic skyrmion lattice

Cited by 16 publications

References 55 publications

Magnon thermal Hall effect via emergent SU(3) flux on the antiferromagnetic skyrmion lattice

Magnon thermal Hall effect via emergent SU(3) flux on the antiferromagnetic skyrmion lattice

Topological magnons in a non-coplanar magnetic order on the triangular lattice

Topological Phases in Magnonics

Contact Info

Product

Resources

About