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Backfolded acoustic phonons in metal-oxide superlattices
F. Lyzwa, A. Chan, J. Khmaladze +5
We report the observation of low-frequency modes in the Raman spectra of thin-film superlattices of the high-temperature superconductor YBaCuO and various…
Electronic and vibrational signatures of ruthenium vacancies in SrRuO thin films
Gideok Kim, Y. Eren Suyolcu, J. Herrero-Martin +12
The synthesis of stoichiometric SrRuO thin films has been a challenge because of the high volatility of ruthenium oxide precursors, which gives rise to ruthenium vacancies…
Selective formation of apical oxygen vacancies in LaSrCuO
Gideok Kim, Georg Christiani, Gennady Logvenov +4
The superconducting properties of high-\tc\ materials are functions of carriers concentration, which is controlled by the concentration of defects including heterovalent cations, i…
Compressive-strain induced enhancement of exchange interactions and short-range magnetic order in SrIrO investigated by Raman spectroscopy
A. Seo, P. P. Stavropoulos, H. -H. Kim +7
We have carried out Raman spectroscopy experiments to investigate two-magnon excitations in epitaxial thin films of the quasi-two-dimensional antiferromagnetic Mott insulator Sr$_2…
Raman scattering from current-stabilized nonequilibrium phases in CaRuO
K. Fürsich, J. Bertinshaw, P. Butler +3
We used Raman light scattering to study the current-stabilized nonequilibrium semimetallic and metallic phases in CaRuO. By determining the local temperature through carefu…
Resonant inelastic x-ray scattering study of bond order and spin excitations in nickelate thin-film structures
K. Fürsich, Y. Lu, D. Betto +13
We used high-resolution resonant inelastic x-ray scattering (RIXS) at the Ni edge to simultaneously investigate high-energy interband transitions characteristic of Ni-O bond…
Spin waves and spin-state transitions in a ruthenate high-temperature antiferromagnet
H. Suzuki, H. Gretarsson, H. Ishikawa +16
Ruthenium compounds play prominent roles in materials research ranging from oxide electronics to catalysis, and serve as a platform for fundamental concepts such as spin-triplet su…
Polarization resolved Cu -edge resonant inelastic x-ray scattering of orbital and spin excitations in NdBaCuO
R. Fumagalli, L. Braicovich, M. Minola +14
High resolution resonant inelastic x-ray scattering (RIXS) has proven particularly effective in the determination of crystal field and spin excitations in cuprates. Its strength li…