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 ${Sr}_{2} {CuO}_{4 - δ} / {La}_{2} {CuO}_{4}$ superlattices

Journal Article · Thu Mar 01 04:00:00 EST 2012 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.85.094519· OSTI ID:1385512

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

X-ray absorption in Sr 2 CuO 4 - δ / La 2 CuO 4 (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 - x Sr x CuO 4 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.

Research Organization:: Energy Frontier Research Centers (EFRC) (United States). Center for Emergent Superconductivity (CES)

Sponsoring Organization:: USDOE SC Office of Basic Energy Sciences (SC-22)

DOE Contract Number:: AC02-98CH10886

OSTI ID:: 1385512

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 Society (APS)

Country of Publication:: United States

Language:: English

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Distinct oxygen hole doping in different layers of ${Sr}_{2} {CuO}_{4 - δ} / {La}_{2} {CuO}_{4}$ superlattices