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Issue 10, 2012
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A first-principles prediction of two-dimensional superconductivity in pristine B2C single layers

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Abstract

Based on first-principles lattice dynamics and electron–phonon coupling calculations, B2C sheets are predicted to be a two-dimensional (2D) phonon-mediated superconductors with a relatively high transition temperature (Tc). The electron–phonon coupling parameter was calculated to be 0.92 and it is mainly contributed by low frequency out-of-plane phonon modes and electronic states with a π character. When the Coulomb pseudopotential, μ*, is set to 0.10, the estimated temperature, Tc, is 19.2 K. To the best of our knowledge, B2C is the first pristine 2D superconductor with a Tc higher than the boiling point of liquid helium.

Graphical abstract: A first-principles prediction of two-dimensional superconductivity in pristine B2C single layers

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Article information


Submitted
17 Dec 2011
Accepted
25 Mar 2012
First published
29 Mar 2012

Nanoscale, 2012,4, 3032-3035
Article type
Communication

A first-principles prediction of two-dimensional superconductivity in pristine B2C single layers

J. Dai, Z. Li, J. Yang and J. Hou, Nanoscale, 2012, 4, 3032
DOI: 10.1039/C2NR12018F

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