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Transport properties of VSe_2 monolayers separated by bilayers of BiSe

机译:BiSe双层分隔的VSe_2单层的传输性质

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摘要

The [(BiSe)_(1+δ)]_1(VSe_2)_1 heterostructure was characterized structurally and electrically to determine the effects of interlayer interaction on the charge density wave (CDW) found in VSe_2 and compared to previously reported [(SnSe)_(1.15)]_1(VSe_2)_1. Out-of-plane x-ray diffraction scans contain reflections that can be indexed as 00/ reflections of a BiSe-VSe_2 supercell. Structure refinement indicates that the VSe_2 layer is very similar structurally to that found in [(SnSe)_(1.15)]_1(VSe_2)_1. Scanning transmission electron microscopy images show a turbostratically disordered layer structure and the formation of anti-phase boundaries in the BiSe bilayer. The [(BiSe)_(1+δ)]_1(VSe_2)_1 heterostructure is metallic with a negative Hall coefficient, in contrast to the positive Hall coefficient found for [(SnSe)_(1.15)]_1(VSe_2)_1. The CDW found [(SnSe)_(1.15)]_1(VSe_2)_1 is not present in [(BiSe)_(1+δ)]_1(VSe_2)_1. This work illustrates the importance of inter constituent interactions in determining the transport properties of single layer films.
机译:[(BiSe)_((1 +δ)] _ 1(VSe_2)_1异质结构在结构上和电学上都有特征,以确定层间相互作用对在VSe_2中发现的电荷密度波(CDW)的影响,并与先前报道的[(SnSe) _(1.15)] _ 1(VSe_2)_1。平面外X射线衍射扫描包含的反射可以被索引为BiSe-VSe_2超单元的00 /反射。结构细化表明VSe_2层在结构上与[(SnSe)_(1.15)] _ 1(VSe_2)_1中的层非常相似。扫描透射电子显微镜图像显示出Bistra双层中的层流紊乱层结构和反相边界的形成。与[(SnSe)_((1.15)] _ 1(VSe_2)_1发现的正霍尔系数相反,[(BiSe)_((1 +δ)] _ 1(VSe_2)_1异质结构是具有负霍尔系数的金属。发现的[(SnSe)_(1.15)] _ 1(VSe_2)_1中的CDW不存在于[(BiSe)_(1 +δ)] _ 1(VSe_2)_1中。这项工作说明了内部组成相互作用在确定单层膜传输特性中的重要性。

著录项

  • 来源
    《Journal of Materials Research》 |2016年第7期|886-892|共7页
  • 作者单位

    Department of Chemistry, University of Oregon, Eugene, OR 97403-1253, USA;

    Department of Chemistry, University of Oregon, Eugene, OR 97403-1253, USA;

    Department of Chemistry, University of Oregon, Eugene, OR 97403-1253, USA;

    Department of Chemistry, University of Oregon, Eugene, OR 97403-1253, USA;

    Department of Chemistry, University of Oregon, Eugene, OR 97403-1253, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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