Peierls Instability Induced Ferromagnetic Insulator at Orbital Order Transition

2008/11/13 by Jianhua Wei, J. H Wei, Dazhi Hou +5
Earth and Planetary Sciences · Materials Science · Physics and Astronomy · #FOS: Physical sciences #High-pressure geophysics and materials #Magnetic and transport properties of perovskites and related materials #Materials Science (cond-mat.mtrl-sci) #Rare-earth and actinide compounds #cond-mat.mtrl-sci

paper · pdf · doi:10.48550/arxiv.0811.2019

6 pages, 3 figures

openalex publication_date 2008/11/13 · arxiv created 2010/01/11 · arxiv updated 2010/01/13 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

The origin of ferromagnetic insulating state of La_7/8Sr_1/8MnO₃ is investigated. Based on the tight-binding model, it is shown that this state can be attributed to the Peierls instability arisen from the interplay of spin and orbital ordering. The importance of the hole-orbiton-phonon intercoupling in doped manganites is revealed. This picture explains well the recent experimental finding of the reentrance of ferromagnetic metal state at low temperature [Phys. Rev. Lett. 96, 097201 (2006)].

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