Inverse Photoemission, Angle-Resolved Photoemission and X-ray Absorption Spectroscopies of Sr<sub>3</sub>Ir<sub>2</sub>O<sub>7 </sub>(001) Thin Film
ORAL
Abstract
Sr3Ir2O7 is a member of the Ruddlesden-Popper series of Strontium Iridates, with unusual surface properties [1,2]. This study of the surface occupied and unoccupied electronic structure of 12 nm Sr3Ir2O7 thin film was conducted using Angle-Resolved Photoemission Spectroscopy (ARPES), Inverse Photoemission Spectroscopy (IPES) and X-ray Absorption Spectroscopy (XAS) measurements.
ARPES revealed the presence of a finite density of states at the Fermi level, at the Sr3Ir2O7 (001) thin film surface [2]. We have evidence of a Fermi level crossing consistent with the finite density of states at EF and find further evidence of metallic surface character from the absence of band bending with the deposition of Au on the surface. We can show that the effective hole mass is very light. The orbital symmetry and elemental weight of the unoccupied bands at the Sr L and O K edges were assigned by comparing angle-resolved XAS and inverse photoemission.
[1] Peace Ikeoluwa Adegbite et al 2025 J. Phys.: Condens. Matter 37 165402
[2] Takashi Komesu et al 2025 J. Phys.: Condens. Matter 37 175002
ARPES revealed the presence of a finite density of states at the Fermi level, at the Sr3Ir2O7 (001) thin film surface [2]. We have evidence of a Fermi level crossing consistent with the finite density of states at EF and find further evidence of metallic surface character from the absence of band bending with the deposition of Au on the surface. We can show that the effective hole mass is very light. The orbital symmetry and elemental weight of the unoccupied bands at the Sr L and O K edges were assigned by comparing angle-resolved XAS and inverse photoemission.
[1] Peace Ikeoluwa Adegbite et al 2025 J. Phys.: Condens. Matter 37 165402
[2] Takashi Komesu et al 2025 J. Phys.: Condens. Matter 37 175002
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Presenters
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Peace Ikeoluwa Adegbite
- University of Nebraska - Lincoln