Distinct Oxygen Hole Doping in Different Layers of Sr2CuO4/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:1044775

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

X-ray absorption in Sr{sub 2}CuO{sub 4-{delta}}/La{sub 2}CuO{sub 4} (SCO/LCO) superlattices shows a variable occupation with doping of a hole state different from holes doped for x {approx}< x{sub optimal} in bulk La{sub 2-x}Sr{sub x}CuO{sub 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: Brookhaven National Lab. (BNL), Upton, NY (United States)
• Sponsoring Organization: USDOE SC OFFICE OF SCIENCE (SC)
• DOE Contract Number: DE-AC02-98CH10886
• OSTI ID: 1044775
• Report Number(s): BNL-98059-2012-JA; KC0201050; TRN: US1203501
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Vol. 85, Issue 9; ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION
ATOMS
OCCUPATIONS
OXYGEN
REFLECTIVITY
SCATTERING
SUPERLATTICES