Magnetic exciton of EuS revealed by resonant inelastic X-Ray scattering

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00618167" target="_blank" >RIV/68378271:_____/25:00618167 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1103/PhysRevLett.134.046401" target="_blank" >https://doi.org/10.1103/PhysRevLett.134.046401</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevLett.134.046401" target="_blank" >10.1103/PhysRevLett.134.046401</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Magnetic exciton of EuS revealed by resonant inelastic X-Ray scattering

Popis výsledku v původním jazyce

We report the valence-to-core resonant inelastic x-ray scattering of EuS measured at the L3 edge of Eu. The obtained data reveal two sets of excitations: one set is composed of a hole in the S 3p bands and an electron excited to extended Eu 5d band states, and the other is made up from a hole in the Eu 4f states and an electron in localized Eu 5d states bound to the 4f hole by its Coulomb potential. The delocalized excitations arise from the dipole-allowed 5⁢d→2⁢p emissions, whereas the localized excitations result from the dipole-forbidden (quadrupole-allowed) 4⁢f→2⁢p emissions. Both these emission channels have a comparable intensity thanks to a small number of occupied 5d states (≈0.6) combined with a large number of occupied 4f states (seven). We identify the localized electron-hole pairs with the “magnetic excitons” suggested in the past as an interpretation of the sharp features seen in the optical absorption spectra. Our observations provide a direct experimental evidence of these excitons, which has been missing up to now.

Název v anglickém jazyce

Magnetic exciton of EuS revealed by resonant inelastic X-Ray scattering

Popis výsledku anglicky

We report the valence-to-core resonant inelastic x-ray scattering of EuS measured at the L3 edge of Eu. The obtained data reveal two sets of excitations: one set is composed of a hole in the S 3p bands and an electron excited to extended Eu 5d band states, and the other is made up from a hole in the Eu 4f states and an electron in localized Eu 5d states bound to the 4f hole by its Coulomb potential. The delocalized excitations arise from the dipole-allowed 5⁢d→2⁢p emissions, whereas the localized excitations result from the dipole-forbidden (quadrupole-allowed) 4⁢f→2⁢p emissions. Both these emission channels have a comparable intensity thanks to a small number of occupied 5d states (≈0.6) combined with a large number of occupied 4f states (seven). We identify the localized electron-hole pairs with the “magnetic excitons” suggested in the past as an interpretation of the sharp features seen in the optical absorption spectra. Our observations provide a direct experimental evidence of these excitons, which has been missing up to now.

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/GA21-09766S" target="_blank" >GA21-09766S: Magnetismus a elektronová struktura aktinoidů laděná ionicitou</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Physical Review Letters

ISSN

0031-9007

e-ISSN

1079-7114

Svazek periodika

134

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

046401

Kód UT WoS článku

001438203200006

EID výsledku v databázi Scopus

2-s2.0-85216301946