Damping of spinful excitons in LaCoO3 by thermal fluctuations: theory and experiment

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F20%3A00534732" target="_blank" >RIV/68378271:_____/20:00534732 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1103/PhysRevB.101.245162" target="_blank" >https://doi.org/10.1103/PhysRevB.101.245162</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevB.101.245162" target="_blank" >10.1103/PhysRevB.101.245162</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Damping of spinful excitons in LaCoO3 by thermal fluctuations: theory and experiment

Popis výsledku v původním jazyce

We present Co L3-edge resonant inelastic x-ray scattering (RIXS) of bulk LaCoO3 across the thermally induced spin-state crossover around 100 K. Owing to a high energy resolution of 25 meV, we observe unambiguously the dispersion of the intermediate-spin (IS) excitations in the low-temperature regime. Approaching the intermediate temperature regime, the IS excitations are damped and the bandwidth is reduced. The observed behavior can be well described by a model of mobile IS excitons with strong attractive interaction, which we solve by using dynamical mean-field theory for hard-core bosons. Our results provide a detailed mechanism of how high-spin and IS excitations interact to establish the physical properties of cobaltite perovskites.n

Název v anglickém jazyce

Damping of spinful excitons in LaCoO3 by thermal fluctuations: theory and experiment

Popis výsledku anglicky

We present Co L3-edge resonant inelastic x-ray scattering (RIXS) of bulk LaCoO3 across the thermally induced spin-state crossover around 100 K. Owing to a high energy resolution of 25 meV, we observe unambiguously the dispersion of the intermediate-spin (IS) excitations in the low-temperature regime. Approaching the intermediate temperature regime, the IS excitations are damped and the bandwidth is reduced. The observed behavior can be well described by a model of mobile IS excitons with strong attractive interaction, which we solve by using dynamical mean-field theory for hard-core bosons. Our results provide a detailed mechanism of how high-spin and IS excitations interact to establish the physical properties of cobaltite perovskites.n

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

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

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

—

Svazek periodika

101

Číslo periodika v rámci svazku

24

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

6

Strana od-do

1-6

Kód UT WoS článku

000543644600005

EID výsledku v databázi Scopus

2-s2.0-85094629824