Novel Electronic Structure Induced by a Highly Strained Oxide Interface with Incommensurate Crystal Fields

2008/06/08 by H. W. Ou, J. F. Zhao, Jun Zhao +23
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Electronic and Structural Properties of Oxides #Magnetic and transport properties of perovskites and related materials #cond-mat.mtrl-sci #cond-mat.str-el

paper · pdf · doi:10.1103/physrevlett.102.026806

published as Phys. Rev. Lett., 102, 026806 (2009) · 5 pages, 4 figures

arxiv created 2008/06/08 · openalex publication_date 2009/01/15 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

The misfit oxide, Bi₂Ba_1.3K_0.6Co_2.1O_7.94, made of alternating rocksalt-structured [BiO/BaO] layers and hexagonal CoO₂ layers, was studied by angle-resolved photoemission spectroscopy, revealing the electronic structure of a highly strained oxide interface. We found that low-energy states are confined within individual sides of the interface, but scattered by the incommensurate crystal field from the other side. Furthermore, the high strain on the rocksalt layer induces large charge transfer to the CoO₂ layer, and a novel effect, the interfacial enhancement of electron-phonon interactions, is discovered.

Citations

• Electronic excitations near the Brillouin zone boundary ofBi2Sr2CaCu2O8+δ
• Insights from Angle-Resolved Photoemission Spectroscopy of an Undoped Four-Layered Two-Gap High-TcSuperconductor
• Misfit-layered cobaltite with an anisotropic giant magnetoresistance:Ca3Co4O9
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• Fermi Surface Evolution and Luttinger Theorem inNaxCoO2: A Systematic Photoemission Study
• Photoemission study ofTiO2∕VO2interfaces