title: Tunable differential conductance of single wall C/BN nanotube heterostructure.
abstract: The transport properties and differential conductance of the heterostructures constructed by (5,5) single wall carbon nanotube (SWCNT) and (5,5) single wall boron nitride nanotube (SWBNNT) are investigated using density functional theory in combination with non-equilibrium Green's functions. We find that the transmission conductance of (5,5) BN/C nanotube heterostructure is not only continually depressed as the BNNT region increases but also the drop of the conductance is uniform in the energy window (-1.43 eV, 1 eV), which leads to linear I-V dependence for the systems when the bias is within this energy range. Moreover, the differential conductance linearly decreases when n ≤ 3 but exponentially decreases when n ≥ 3 for (5,5)(BN) n /C heterostructure. Such tunable differential conductance of (5,5) BN/C nanotube heterostructure mainly derives from the blockage of the transport channels induced by the semiconductive BN segment.
authors.affiliation: Laboratory for Quantum Engineering and Micro-Nano Energy Technology, Xiangtan University, Xiangtan, Hunan 411105, People's Republic of China.
authors.forename: Huaping
authors.initials: H
authors.lastname: Xiao
authors.forename: Chuanxiao
authors.initials: C
authors.lastname: Zhang
authors.forename: Kaiwang
authors.initials: K
authors.lastname: Zhang
authors.forename: Lizhong
authors.initials: L
authors.lastname: Sun
authors.forename: Jianxin
authors.initials: J
authors.lastname: Zhong
references.citation: Nano Lett. 2007 Nov;7(11):3518-22
references.pmid: 17973439
references.citation: Nano Lett. 2007 Aug;7(8):2295-9
references.pmid: 17628112
references.citation: Phys Rev B Condens Matter. 1995 Apr 15;51(16):11229-11232
references.pmid: 9977849
references.citation: Science. 1999 Nov 5;286(5442):1127-9
references.pmid: 10550044
references.citation: Science. 1995 Aug 18;269(5226):966-7
references.pmid: 17807732
references.citation: Phys Rev B Condens Matter. 1994 Dec 15;50(24):17953-17979
references.pmid: 9976227
references.citation: Phys Rev B Condens Matter. 1994 Feb 15;49(7):5081-5084
references.pmid: 10011453
references.citation: Phys Rev Lett. 1996 Oct 28;77(18):3865-3868
references.pmid: 10062328
references.citation: Science. 2000 Jul 7;289(5476):94-7
references.pmid: 10884232
references.citation: J Am Chem Soc. 2007 Aug 8;129(31):9562-3
references.pmid: 17636915
references.citation: Science. 1997 Mar 28;275(5308):1922-5
references.pmid: 9072967
references.citation: J Am Chem Soc. 2009 Feb 11;131(5):1682-3
references.pmid: 19152268
references.citation: Phys Rev Lett. 2000 Aug 21;85(8):1710-3
references.pmid: 10970595
references.citation: Phys Rev Lett. 2006 Mar 17;96(10):106804
references.pmid: 16605774