Intrinsic phonon-mediated superconductivity in graphene-like BSi lattice

The research of new superconductors is an ongoing field for the fundamental significances and potential applications, and two-dimensional (2D) nanomaterials open a new alluring branch for exploration. Here we predict by first-principles calculations that 2D pristine graphene-like BSi monolayer is a...

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Bibliographic Details
Published in:Journal of physics. Condensed matter 2019-08, Vol.31 (34), p.345401-345401
Main Authors: Meng, L-B, Zhou, M J, Zhang, Y J, Ni, S
Format: Article
Language:English
Subjects:
2D graphene-like sheet
BSi monolayer
critical temperature
electron-phonon coupling
first-principles calculations
superconductivity
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Summary:The research of new superconductors is an ongoing field for the fundamental significances and potential applications, and two-dimensional (2D) nanomaterials open a new alluring branch for exploration. Here we predict by first-principles calculations that 2D pristine graphene-like BSi monolayer is a phonon-mediated superconductor above the boiling point of liquid helium. The intrinsic covalent-metallic ground state, large density of states at Fermi energy, proper electronic organization as well as strong coupling of out-of-plane phonons and electrons endow an intermediate electron-phonon coupling of ~1.12, rendering this honeycomb sheet as a conventional superconductor with a relatively high Tc ~ 11 K. As the global minimum structure in the 2D space previously predicted, this superconducting BSi monolayer may be feasible experimentally. Our finding provides a new field of superconducting nanomaterials for study.
ISSN:0953-8984
1361-648X
DOI:10.1088/1361-648X/ab21eb