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Issue 17, 2018
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Robust ferroelectricity in two-dimensional SbN and BiP

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Based on first-principles calculations, we discover two new two-dimensional (2D) ferroelectric materials SbN and BiP. Both of them are stable in a phosphorene-like structure and maintain their ferroelectricity above room temperature. Till date, SbN has the largest in-plane spontaneous polarization of about 7.81 × 10−10 C m−1 ever found in 2D ferroelectric materials, and it can retain its ferroelectricity until melting at about 1700 K. The spontaneous polarizations and switching barriers can easily be tuned by strains. Additionally, the ferroelectricity can still be maintained in their multilayers. These advantages make SbN and BiP promising candidate materials for future integrated ferroelectric devices.

Graphical abstract: Robust ferroelectricity in two-dimensional SbN and BiP

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The article was received on 03 Dec 2017, accepted on 27 Mar 2018 and first published on 28 Mar 2018

Article type: Paper
DOI: 10.1039/C7NR09006D
Nanoscale, 2018,10, 7984-7990

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    Robust ferroelectricity in two-dimensional SbN and BiP

    C. Liu, W. Wan, J. Ma, W. Guo and Y. Yao, Nanoscale, 2018, 10, 7984
    DOI: 10.1039/C7NR09006D

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