Distinct oxygen hole doping in different layers of Sr₂CuO4-δ/La₂CuO₄ superlattices

Smadici, S.; Lee, J. C. T.; Rusydi, A.; Logvenov, G.; Bozovic, I.; Abbamonte, P.

doi:10.1103/PhysRevB.85.094519

Distinct oxygen hole doping in different layers of Sr₂CuO_4-δ/La₂CuO₄ superlattices

Journal Article · Wed Mar 28 00:00:00 EDT 2012 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.85.094519· OSTI ID:1098605

Smadici, S.; Lee, J. C. T.; Rusydi, A.; Logvenov, G.; Bozovic, I.; Abbamonte, P.

X-ray absorption in Sr₂CuO_4-δ/La₂CuO₄ (SCO/LCO) superlattices shows a variable occupation with doping of a hole state different from holes doped for x≲x_optimal in bulk La_2-xSr_xCuO₄ and suggests that this hole state is on apical oxygen atoms and polarized in the a-b plane. Considering the surface reflectivity gives a good qualitative description of the line shapes of resonant soft x-ray scattering. The interference between superlattice and surface reflections was used to distinguish between scatterers in the SCO and the LCO layers, with the two hole states maximized in different layers of the superlattice.

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Sponsoring Organization:: USDOE

OSTI ID:: 1098605

Alternate ID(s):: OSTI ID: 1385512
OSTI ID: 1044775
OSTI ID: 1069539

Journal Information:: Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 9 Vol. 85; ISSN 1098-0121; ISSN PRBMDO

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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