Abstract：
:A theoretical investigation of the unique electronic transport properties of the junctions composed of boron nitride atomic chains bridging symmetric graphene electrodes with point-contacts is executed through non-equilibrium Green's function technique in combination with density functional theory. Compared with carbon atomic chains, the boron nitride atomic chains have an alternative arrangement of polar covalent B-N bonds and different contacts coupling electrodes, showing some unusual properties in functional atomic electronic devices. Remarkably, they have an extraordinary odd-even behavior of conductivity with the length increase. The rectification character and negative differential resistance of nonlinear current-voltage characteristics can be achieved by manipulating the type of contacts between boron nitride atomic chains bridges and electrodes. The junctions with asymmetric contacts have an intrinsic rectification, caused by stronger coupling in the C-N contact than the C-B contact. On the other hand, for symmetric contact junctions, it is confirmed that the transport properties of the junctions primarily depend on the nature of contacts. The junctions with symmetric C-N contacts have higher conductivity than their C-B contacts counterparts. Furthermore, the negative differential resistances of the junctions with only C-N contacts is very conspicuous and can be achieved at lower bias.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Xu X,Li W,Liu L,Feng J,Jiang Y,Tian WQdoi
10.1038/srep26389subject
Has Abstractpub_date
2016-05-23 00:00:00pages
26389issn
2045-2322pii
srep26389journal_volume
6pub_type
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pub_type： 杂志文章
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pub_type： 杂志文章,meta分析
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pub_type： 杂志文章,多中心研究
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