Atomistic spin dynamics simulations of magnonic spin Seebeck and spin Nernst effects in altermagnets

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F24%3A00598717" target="_blank" >RIV/68378271:_____/24:00598717 - isvavai.cz</a>

Výsledek na webu

<a href="https://hdl.handle.net/11104/0356382" target="_blank" >https://hdl.handle.net/11104/0356382</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevB.110.094427" target="_blank" >10.1103/PhysRevB.110.094427</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Atomistic spin dynamics simulations of magnonic spin Seebeck and spin Nernst effects in altermagnets

Popis výsledku v původním jazyce

Magnon band structures in altermagnets are characterized by an energy splitting of modes with opposite chirality, even in the absence of applied external fields and relativistic effects, because of an anisotropy in the Heisenberg exchange interactions. We perform quantitative atomistic spin dynamics simulations based on ab initio electronic structure calculations on rutile RuO2, a prototypical “d-wave” altermagnet, to study magnon currents generated by thermal gradients. We report substantial spin Seebeck and spin Nernst effects, i.e., longitudinal or transverse spin currents, depending on the propagation direction of the magnons with respect to the crystal, together with a finite spin accumulation associated with nonlinearities in the temperature profile. Our findings are consistent with the altermagnetic spin-group symmetry, as well as predictions from linear spin-wave theory and semiclassical Boltzmann transport theory.

Název v anglickém jazyce

Atomistic spin dynamics simulations of magnonic spin Seebeck and spin Nernst effects in altermagnets

Popis výsledku anglicky

Magnon band structures in altermagnets are characterized by an energy splitting of modes with opposite chirality, even in the absence of applied external fields and relativistic effects, because of an anisotropy in the Heisenberg exchange interactions. We perform quantitative atomistic spin dynamics simulations based on ab initio electronic structure calculations on rutile RuO2, a prototypical “d-wave” altermagnet, to study magnon currents generated by thermal gradients. We report substantial spin Seebeck and spin Nernst effects, i.e., longitudinal or transverse spin currents, depending on the propagation direction of the magnons with respect to the crystal, together with a finite spin accumulation associated with nonlinearities in the temperature profile. Our findings are consistent with the altermagnetic spin-group symmetry, as well as predictions from linear spin-wave theory and semiclassical Boltzmann transport theory.

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

<a href="/cs/project/GA23-04746S" target="_blank" >GA23-04746S: Teorie magnetických systémů v elektrických a elektromagnetických polích</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

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

110

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

14

Strana od-do

094427

Kód UT WoS článku

001318314500003

EID výsledku v databázi Scopus

2-s2.0-85204678340