Signatures of stripe phases in hole-doped La{sub 2}NiO{sub 4}

Journal Article · Wed Jul 01 04:00:00 EDT 1998 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.58.503· OSTI ID:636186

Yi, Y; Yu, Z; Bishop, A R; Gammel, J T ^[1]

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1. Theoretical Division and Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

We model nickelate-centered and oxygen-centered stripe phases in doped La{sub 2}NiO{sub 4} materials. We use an inhomogeneous Hartree-Fock and random-phase approximation approach including both electron-electron and electron-lattice (e-l) coupling for a layer of La{sub 2}NiO{sub 4}. We find that whether the ground state after commensurate hole doping comprises Ni-centered or O-centered charge-localized stripes depends sensitively on the e-l interaction. With increasing e-l interaction strength, a continuous transition from an O-centered stripe phase to a Ni-centered one is found. Various low- and high-energy signatures of these two kinds of stripe phases are predicted, which can clearly distinguish them. These signatures reflect the strongly correlated spin-charge-lattice features in the vicinity of Ni-centered or O-centered stripe domains. The importance of e-l interaction for recent experiments on stripe phases is discussed. {copyright} {ital 1998} {ital The American Physical Society}

• OSTI ID: 636186
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 1 Vol. 58; ISSN 0163-1829; ISSN PRBMDO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRYSTAL DOPING
DOPED MATERIALS
ELECTRON-ELECTRON COUPLING
ELECTRON-HOLE COUPLING
ELECTRON-PHONON COUPLING
GROUND STATES
HOLES
INFRARED SPECTRA
LANTHANUM COMPOUNDS
LAYERS
NICKEL OXIDES
SPIN-LATTICE RELAXATION