Transverse and longitudinal magnons in the strongly anisotropic antiferromagnet FePSe3

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F24%3A10484478" target="_blank" >RIV/00216208:11320/24:10484478 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22310/24:43929961

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=xgtA_vRmd1" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=xgtA_vRmd1</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevB.109.134410" target="_blank" >10.1103/PhysRevB.109.134410</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Transverse and longitudinal magnons in the strongly anisotropic antiferromagnet FePSe3

Popis výsledku v původním jazyce

FePSe(3) is a collinear honeycomb antiferromagnet with an easy-axis anisotropy and large spins S = 2. It belongs to a family of magnetic van der Waals materials which recently attracted considerable attention. In this work we present an experimental magneto-optical study of the low-energy excitation spectrum in FePSe(3), together with its theoretical description. The observed response contains several types of magnon excitations. Two of them are conventional transverse magnons described by a classical theory of antiferromagnetic resonance. Two other modes are identified as multimagnon hexadecapole excitations with an anomalous g factor approximately equal to 4 times the g factor of a single Fe(2+) ion. These quasiparticles correspond to full reversals of iron spins that coherently propagate in the up-down antiferromagnetic structure. They constitute a novel type of collective excitations in anisotropic magnetic solids, called longitudinal magnons. Comparison between theory and experiment allows us to estimate the microscopic parameters of FePSe(3), including exchange coupling constants and the single-ion anisotropy.

Název v anglickém jazyce

Transverse and longitudinal magnons in the strongly anisotropic antiferromagnet FePSe3

Popis výsledku anglicky

FePSe(3) is a collinear honeycomb antiferromagnet with an easy-axis anisotropy and large spins S = 2. It belongs to a family of magnetic van der Waals materials which recently attracted considerable attention. In this work we present an experimental magneto-optical study of the low-energy excitation spectrum in FePSe(3), together with its theoretical description. The observed response contains several types of magnon excitations. Two of them are conventional transverse magnons described by a classical theory of antiferromagnetic resonance. Two other modes are identified as multimagnon hexadecapole excitations with an anomalous g factor approximately equal to 4 times the g factor of a single Fe(2+) ion. These quasiparticles correspond to full reversals of iron spins that coherently propagate in the up-down antiferromagnetic structure. They constitute a novel type of collective excitations in anisotropic magnetic solids, called longitudinal magnons. Comparison between theory and experiment allows us to estimate the microscopic parameters of FePSe(3), including exchange coupling constants and the single-ion anisotropy.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physical Review B

ISSN

2469-9950

e-ISSN

2469-9969

Svazek periodika

109

Číslo periodika v rámci svazku

13

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

134410

Kód UT WoS článku

001234807400006

EID výsledku v databázi Scopus

2-s2.0-85190275925