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Spin-Polarized Transport Through Devices of Er Single-Ion Magnets and Its Derivatives

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Abstract

We will study the spin-polarized transport through devices of single-ion magnets. A device consisted of the scanning tunneling microscopy (STM) Co tip, the single-ion magnet (Cp*) Ln (COT) (Cp* represents pentamethyl pentacadiene; Ln represents ErIII, DyIII, HoIII; COT stands for cyclooctatetraene), and the Au(111) substrate is proposed. We calculate the current curve for the parallel and anti-parallel configurations for the device of Er single-ion magnet, and find that the tunnel magnetoresistance (TMR) changes with bias − 34~24%, which indicates it is promising for the application in magnetic storage. After comparing the currents through devices of (Cp*) Ln (COT) single-ion magnets, we find that Er single-ion magnet has a better rectifying character than Dy and Ho single-ion magnet, but Ho single-ion magnet has an obvious negative differential conductance. By analysis of their transmission spectrums, these properties are well explained. The spin-polarized transport for the derivatives of Er single-ion magnets is also investigated; we find that they have better rectification and negative differential conductance features, and have potential application on multifunctional molecular devices.

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Funding

This study is supported by the National Key R&D Program of China (Grant No. 2018FYA0305804), and the Key Research Program of the Chinese Academy of Sciences (Grant No. XDPB08-3).

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Authors and Affiliations

  1. Department of Physics & CAS Center for Excellence in Topological Quantum Computation, The University of Chinese Academy of Sciences, P. O. Box 4588, Beijing, 100049, China

    Jie Zhou & Zheng-Chuan Wang

  2. Beijing Electronic Science & Technology Institute, Beijing, China

    Xue-Ming Sun

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  1. Jie Zhou
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  2. Xue-Ming Sun
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  3. Zheng-Chuan Wang
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Correspondence to Zheng-Chuan Wang.

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Zhou, J., Sun, XM. & Wang, ZC. Spin-Polarized Transport Through Devices of Er Single-Ion Magnets and Its Derivatives. J Supercond Nov Magn 33, 3555–3562 (2020). https://doi.org/10.1007/s10948-020-05619-7

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  • DOI: https://doi.org/10.1007/s10948-020-05619-7

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