2020
DOI: 10.1103/physrevb.102.014450
|View full text |Cite
|
Sign up to set email alerts
|

Nonreciprocal magnons in a two-dimensional crystal with out-of-plane magnetization

Abstract: Nonreciprocal spin waves have a chiral asymmetry so that their energy is different for two opposite wave vectors. They are found in atomically thin ferromagnetic overlayers with in-plane magnetization and are linked to the antisymmetric Dzyaloshinskii-Moriya surface exchange. We use an itinerant fermion theory based on first-principles calculations to predict that nonreciprocal magnons can occur in Fe 3 GeTe 2 , the first stand-alone metallic two-dimensional crystal with out-of-plane magnetization. We find tha… Show more

Help me understand this report
View preprint versions

Search citation statements

Order By: Relevance

Paper Sections

Select...
3
1

Citation Types

0
21
0

Year Published

2021
2021
2024
2024

Publication Types

Select...
7
1

Relationship

1
7

Authors

Journals

citations
Cited by 20 publications
(21 citation statements)
references
References 46 publications
0
21
0
Order By: Relevance
“…This implies, for example, that magnons can be accessed by perturbing electric fields and that magnons may couple to plasmons and excitons in metals and insulators, respectively. Moreover, spin-orbit coupling may induce topological gaps between magnon branches [52,53], which implies the existence of topological robust surface magnons, or induce nonreciprocity in the magnon dispersion relation [54]. We believe that first principles calculations could help unravel such exotic phenomena in the future.…”
Section: Discussionmentioning
confidence: 95%
See 2 more Smart Citations
“…This implies, for example, that magnons can be accessed by perturbing electric fields and that magnons may couple to plasmons and excitons in metals and insulators, respectively. Moreover, spin-orbit coupling may induce topological gaps between magnon branches [52,53], which implies the existence of topological robust surface magnons, or induce nonreciprocity in the magnon dispersion relation [54]. We believe that first principles calculations could help unravel such exotic phenomena in the future.…”
Section: Discussionmentioning
confidence: 95%
“…In the Supplemental Material [41], we supply a table of threshold values η t corresponding to the intersection with ω = 5 meV found by linear interpolation. As an example, we find η t = 126 meV for iron with the (54,54,54) k-point grid shown in Fig. 5(c) and η t = 87 meV with the (78, 78, 78) k-point grid shown in Fig.…”
Section: E Convergence Of the Kohn-sham Continuummentioning
confidence: 88%
See 1 more Smart Citation
“…, where, for the SH conductivity, X η ¼ ŝη and for the OH conductivity (OHC), X η ¼ lη ; ŝη and l η represent the η components of the spin and of the atomic angular momentum operators, respectively. This is implemented in the PAOFLOW code [41] that has been successfully used to study topological materials [42,43] and time dependent spin dynamics [44] among other topics. For our conductivity calculations, we have increased the sampling to 200 × 200 × 1 k points in the 2D BZ.…”
mentioning
confidence: 99%
“…To study the convergence of the Stoner continuum further, it is worthwhile to remark, that the macroscopic spectrum of Stoner excitations is much cheaper to compute than the full transverse magnetic excitation spectrum, as no extra plane wave components are needed, when the Dyson equation (51) does not have to be inverted. Thus, it would be of great value, if the convergence of the Stoner continuum could be assessed from the Kohn-Sham spectral function itself.…”
Section: E Convergence Of the Kohn-sham Continuummentioning
confidence: 99%