Title

Metal-Insulator Transition in CuIr2S4: XAS Results on the Electronic Structure

Abstract

S K and Ir L3 x-ray absorption measurements across the temperature-induced metal (M) to insulator (I) transition in Culr2S4 are presented. Dramatic S K-edge changes reflect the Ir d-electronic state redistribution across this transition. These changes, along with a detailed consideration of the I-phase structure, motivate a model in which the I-phase stabilization involves an interplay of charge and d-orbital orientation ordering along Ir chains, a quadrupling of the Ir-chain repeat unit, and correlated dimer spin-singlet formation.

Department(s)

Physics

Keywords and Phrases

Copper Complex; Metal Complex; Electronics; Low Temperature; Measurement; Neutron Scattering; Radiation Absorption; Structure Analysis; X Ray

International Standard Serial Number (ISSN)

0163-1829

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2003 American Physical Society (APS), All rights reserved.

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