2017/12/31 by Chi‐Cheng Lee, Chi-Cheng Lee, Baojie Feng +8
Chemistry · Materials Science · Physics and Astronomy · #Boron and Carbon Nanomaterials Research #Borophene #Doping #Fullerene Chemistry and Applications #Graphene #Graphene research and applications #Materials science #Nanotechnology #Optoelectronics #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevb.97.075430
published as Phys. Rev. B 97, 075430 (2018) · 5 pages, 3 figures, 1 table
arxiv created 2018/02/07 · openalex publication_date 2018/02/20 · arxiv updated 2018/02/23 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Engineering atomic-scale structures allows great manipulation of physical properties and chemical processes for advanced technology. We show that the B atoms deployed at the centers of honeycombs in boron sheets, borophene, behave as nearly perfect electron donors for filling the graphitic \ensuremathσ bonding states without forming additional in-plane bonds by first-principles calculations. The dilute electron density distribution owing to the weak bonding surrounding the center atoms provides easier atomic-scale engineering and is highly tunable via in-plane strain, promising for practical applications, such as modulating the extraordinarily high thermal conductance that exceeds the reported value in graphene. The hidden honeycomb bonding structure suggests an unusual energy sequence of core electrons that has been verified by our high-resolution core-level photoelectron spectroscopy measurements. With the experimental and theoretical evidence, we demonstrate that borophene exhibits a peculiar bonding structure and is distinctive among two-dimensional materials.