4.5 Article

Symmetrical metallic and magnetic edge states of nanoribbon from semiconductive monolayer PtS2

期刊

PHYSICS LETTERS A
卷 382, 期 11, 页码 776-780

出版社

ELSEVIER
DOI: 10.1016/j.physleta.2018.01.021

关键词

First-principles; 2D materials; Nanoribbons; Metallic nanowire

资金

  1. National Natural Science Foundation of China [51671086]
  2. Hunan Provincial Natural Science Foundation of China [2016JJ3089]
  3. excellent youth fund of Hunan Provincial Education Department [16B151]

向作者/读者索取更多资源

Transition metal dichalcogenides (TMD) MoS2 or graphene could be designed to metallic nanoribbons, which always have only one edge show metallic properties due to symmetric protection. In present work, a nanoribbon with two parallel metallic and magnetic edges was designed from a noble TMD PtS2 by employing first-principles calculations based on density functional theory (DFT). Edge energy, bonding charge density, band structure, density of states (DOS) and simulated scanning tunneling microscopy (STM) of four possible edge states of monolayer semiconductive PtS2 were systematically studied. Detailed calculations show that only Pt-terminated edge state among four edge states was relatively stable, metallic and magnetic. Those metallic and magnetic properties mainly contributed from 5d orbits of Pt atoms located at edges. What's more, two of those central symmetric edges coexist in one zigzag nanoribbon, which providing two atomic metallic wires thus may have promising application for the realization of quantum effects, such as Aharanov-Bohm effect and atomic power transmission lines in single nanoribbon. (C) 2018 Elsevier B.V. All rights reserved.

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