Impact of Fe doping on the electronic structure of SrTiO3 thin films determined by resonant photoemission
PBN-AR
Instytucja
Wydział Matematyki, Fizyki i Chemii (Uniwersytet Śląski w Katowicach)
Informacje podstawowe
Główny język publikacji
angielski
Czasopismo
JOURNAL OF CHEMICAL PHYSICS (35pkt w roku publikacji)
ISSN
0021-9606
EISSN
1089-7690
Wydawca
AMER INST PHYSICS
DOI
URL
Rok publikacji
2018
Numer zeszytu
154702
Strony od-do
1-8
Numer tomu
15
Identyfikator DOI
Liczba arkuszy
0,40
Autorzy
Pozostali autorzy
+ 5
Streszczenia
Język
angielski
Treść
Epitaxial thin films of Fe doped SrTiO3 have been studied by the use of resonant photoemission. This technique allowed us to identify contributions of the Fe and Ti originating electronic states to the valence band. Two valence states of iron Fe2+ and Fe3+, detected on the base of x-ray absorption studies spectra, appeared to form quite different contributions to the valence band of SrTiO3. The electronic states within the in-gap region can be attributed to Fe and Ti ions. The Fe2+ originating states which can be connected to the presence of oxygen vacancies form a broad band reaching binding energies of about 0.5 eV below the conduction band, while Fe3+ states form in the gap a sharp feature localized just above the top of the valence band. These structures were also confirmed by calculations performed with the use of the FP-LAPW/APW+lo method including Coulomb correlations within the d shell. It has been shown that Fe doping induced Ti originating states in the energy gap which can be related to the hybridization of Ti and Fe 3d orbitals.
Cechy publikacji
original-article
Inne
System-identifier
3342900144991
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