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    Electrical Control of Structural and Physical Properties via Strong Spin-Orbit Interactions in Sr2IrO4

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    1711.10021v1.pdf
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    Genre
    Pre-print
    Date
    2018-01-04
    Author
    Cao, G
    Terzic, J
    Zhao, HD
    Zheng, H
    De Long, LE
    Riseborough, PS
    Subject
    cond-mat.str-el
    cond-mat.str-el
    Permanent link to this record
    http://hdl.handle.net/20.500.12613/4806
    
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    DOI
    10.1103/PhysRevLett.120.017201
    Abstract
    © 2018 American Physical Society. Electrical control of structural and physical properties is a long-sought, but elusive goal of contemporary science and technology. We demonstrate that a combination of strong spin-orbit interactions (SOI) and a canted antiferromagnetic Mott state is sufficient to attain that goal. The antiferromagnetic insulator Sr2IrO4 provides a model system in which strong SOI lock canted Ir magnetic moments to IrO6 octahedra, causing them to rigidly rotate together. A novel coupling between an applied electrical current and the canting angle reduces the Néel temperature and drives a large, nonlinear lattice expansion that closely tracks the magnetization, increases the electron mobility, and precipitates a unique resistive switching effect. Our observations open new avenues for understanding fundamental physics driven by strong SOI in condensed matter, and provide a new paradigm for functional materials and devices.
    Citation to related work
    American Physical Society (APS)
    Has part
    Physical Review Letters
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    http://dx.doi.org/10.34944/dspace/4788
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