Distinct oxygen hole doping in different layers of superlattices
Journal Article
·
· Physical Review. B, Condensed Matter and Materials Physics
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 Office of Science (SC), Basic Energy Sciences (BES)
- DOE Contract Number:
- AC02-98CH10886
- OSTI ID:
- 1385512
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 85, Issue 9; Related Information: CES partners with Brookhaven National Laboratory (BNL); Argonne National Laboratory; University of Illinois, Urbana-Champaign; Los Alamos National Laboratory; ISSN 1098-0121
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
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