Spectroscopy of Stripe Order in La1.8Sr0.2NiO4 Using Resonant Soft X-Ray Diffraction

Journal Article · Sat Jan 01 04:00:00 EST 2005 · Phys. Rev. Lett.

DOI:https://doi.org/10.1103/PhysRevLett.95.156402· OSTI ID:913690

Schubler-Langeheine, C; Schlappa, J; Tanaka, A; Hu, Z; Chang, C; Schierle, E; Benomar, M; Ott, H; Weschke, E

Strong resonant enhancements of the charge-order and spin-order superstructure-diffraction intensities in La1.8Sr0.2NiO4 are observed when x-ray energies in the vicinity of the Ni L2, 3 absorption edges are used. The pronounced photon-energy and polarization dependences of these diffraction intensities allow for a critical determination of the local symmetry of the ordered spin and charge carriers. We found that not only the antiferromagnetic order but also the charge-order superstructure resides within the NiO2 layers; the holes are mainly located on in-plane oxygens surrounding a Ni{sup 2+} site with the spins coupled antiparallel in close analogy to Zhang-Rice singlets in the cuprates.

• Research Organization: Brookhaven National Laboratory (BNL) National Synchrotron Light Source
• Sponsoring Organization: Doe - Office Of Science
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 913690
• Report Number(s): BNL--78258-2007-JA
• Journal Information: Phys. Rev. Lett., Journal Name: Phys. Rev. Lett. Vol. 95; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANTIFERROMAGNETISM
CHARGE CARRIERS
HOLES
LANTHANUM OXIDES
NICKEL OXIDES
SOFT X RADIATION
SPIN
STRONTIUM OXIDES
X-RAY DIFFRACTION
national synchrotron light source