Charge localization and stripes in a two-dimensional three-band Peierls-Hubbard model

Journal Article · Sun Feb 01 04:00:00 EST 1998 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.57.R3241· OSTI ID:573985

Yu, Z G; Zang, J; Gammel, J T; Bishop, A R ^[1]

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1. Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

Using a two-dimensional three-band Peierls-Hubbard model appropriate to layered transition-metal oxides, and in an inhomogeneous Hartree-Fock approximation, we show that several kinds of charge-localized mesoscopic patterns (stripes) may exist: vertical site stripes, vertical zig-zag stripes, diagonal site stripes, and oxygen-centered stripes. A random-phase-approximation analysis reveals new phonon modes and intense low-energy spin excitations in these stripes. A softened phonon mode with momentum ({pi},0) in the oxygen-centered stripe may explain the anomalous phonons observed by neutron-scattering experiments in several cuprate superconductors. {copyright} {ital 1998} {ital The American Physical Society}

• OSTI ID: 573985
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 6 Vol. 57; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BAND THEORY
CHARGE RENORMALIZATION
COPPER OXIDES
CUPRATES
DENSITY MATRIX
HARTREE-FOCK METHOD
HIGH-TC SUPERCONDUCTORS
HUBBARD MODEL
LANTHANUM OXIDES
NEUTRON DIFFRACTION
PHONONS
POLARONS
STRONTIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
TWO-DIMENSIONAL CALCULATIONS