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      Stability and electronic properties of monolayer and multilayer structures of group-IV elements and compounds of complementary groups in biphenylene network

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      Author(s)
      Demirci, S.
      Çallıoğlu, Şafak
      Görkan, T.
      Aktürk, E.
      Çıracı, Salim
      Date
      2022-01-07
      Source Title
      Physical Review B.
      Print ISSN
      2469-9950
      Electronic ISSN
      2469-9969
      Publisher
      American Physical Society
      Volume
      105
      Issue
      3
      Pages
      035408-1 - 035408-9
      Language
      English
      Type
      Article
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      Abstract
      We predict that specific group-IV elements and IV-IV, III-V, and II-VI compounds can form stable, freestanding two-dimensional (2D) monolayers consisting of octagon, hexagon, and square rings (ohs), in which the threefold coordination of atoms is preserved to allow sp2-type hybridization. These monolayers can also construct bilayers, multilayers, three-dimensional (3D) layered van der Waals solids, and 3D crystals with strong vertical bonds between layers as well as quasi-one-dimensional nanotubes and nanoribbons with diverse edge geometries. All these ohs structures can constitute a large class of 2D materials ranging from good metals to wide bandgap semiconductors and display physical and chemical properties rather different from those of their counterparts in the hexagonal (honeycomb) network. The metallic state of freestanding 2D C, Si, and Ge ohs monolayers and 3D C ohs bulk contrast, respectively, with graphene, silicene, germanene, and graphite.
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      http://hdl.handle.net/11693/111823
      Published Version (Please cite this version)
      https://doi.org/10.1103/PhysRevB.105.035408
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      • Department of Electrical and Electronics Engineering 4011
      • Department of Physics 2550
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