Chiral Single-Wall Gold Nanotubes

Senger, R. T.; Dağ, S.; Çiraci, S.

doi:10.1103/physrevlett.93.196807

Cited by 96 publications

(128 citation statements)

References 22 publications

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“…[1][2][3] Metallic nanowires in the form of atomic strings, [4][5][6][7][8][9][10][11] as well as single-shell or multishell helical tubes [12][13][14] have been actively studied due to their unusual structural and electronic properties, such as giant Young's modulus 15,16 and stepwise variation of electronic conductance with the cross section. [17][18][19][20] Aside from fundamental physical interest, nanowires find their relevance in nanotechnology as the potential interconnects between nanodevices.…”

Section: Introductionmentioning

confidence: 99%

Atomic chains of group-IV elements and III-V and II-VI binary compounds studied by a first-principles pseudopotential method

et al. 2005

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Using the first-principles plane wave pseudopotential method we have studied structural, electronic, and transport properties of atomic chains of group-IV elements and group III-V and group II-VI binary compounds. Several materials which are insulating or semiconducting in bulk are found to be metallic in nanowire structures. Our calculations reveal that monatomic chains of Si, Ge, and Sn elements, and of binary compounds such as InP, GaAs, and AlSb, are stable and metallic. On the other hand, compound wires of BN, SiC, GaN, ZnSe, and several others have semiconducting or insulating properties. Ideal mechanical strength calculations show that some of these atomic chains can sustain strains of up to = 0.3. We have presented ab initio electron transport calculations for Si and AlP linear chain segments in between Al electrodes. Conductance of Si monatomic chains displays some nontrivial features as the number of atoms in the chain is varied or as the chain is strained. In addition to single atomic chain structures, junctions and grid structures of Si are investigated.

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Section: Introductionmentioning

confidence: 99%

Atomic chains of group-IV elements and III-V and II-VI binary compounds studied by a first-principles pseudopotential method

et al. 2005

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“…Nm, 73.63.Fg, 73.22.D Nanotubes and nanowires are of interest, not only because of their potential for deployment as interconnects, p-n junctions and rectifiers [1,2] in future nanoscale circuits, but also because they exhibit fundamental physical properties, such as conductance quantisation [3,4], and magic numbers reflecting structural stabilities [5,6]. One ubiquitous property associated with nanotubes is chirality, which arises because there is an infinite number of ways of rolling up a two-dimensional periodic lattice to form a cylinder.…”

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confidence: 99%

“…In what follows, we focus on the (5, 3) and (4, 3) AuNTs, since these are realistic experimental targets [6,25]. As a consequence of curvature, we also expect that the Fermi energy of the tube will be shifted from that of the sheet.…”

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confidence: 99%

Chiral currents in gold nanotubes

Manrique

Cserti²,

Lambert³

2010

Phys. Rev. B

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Results are presented for the electron current in gold chiral nanotubes (AuNTs). Starting from the band structure of (4, 3) and (5, 3) AuNTs, we find that the magnitude of the chiral currents are greater than those found in carbon nanotubes. We also calculate the associated magnetic flux inside the tubes and find this to be higher than the case of carbon nanotubes. Although (4,3) and (5,3) AuNTs carry transverse momenta of similar magnitudes, the low-bias magnetic flux carried by the former is far greater than that carried by the latter. This arises because the low-bias longitudinal current carried by a (4,3) AuNT is significantly smaller than that of a (5,3) AuNT.PACS numbers: 73.63. Nm, 73.63.Fg, 73.22.D Nanotubes and nanowires are of interest, not only because of their potential for deployment as interconnects, p-n junctions and rectifiers [1,2] in future nanoscale circuits, but also because they exhibit fundamental physical properties, such as conductance quantisation [3,4], and magic numbers reflecting structural stabilities [5,6]. One ubiquitous property associated with nanotubes is chirality, which arises because there is an infinite number of ways of rolling up a two-dimensional periodic lattice to form a cylinder. In addition to widely-studied carbon nanotubes [7], chiral nanotubes have been formed from a range of other materials, including gold [5,8,9], platinum [10], silver [11], alkaline metals [12][13][14] and boron nitride [15,16]. These experimental observations have been supported by a range of theoretical investigations [17][18][19][20][21][22].It has recently been noted that the presence of intrinsic chiral electron currents in chiral nanotubes can be exploited to yield photogalvanic effects in heteropolar nanotubes [17], a new drive mechanism in carbon-nanotube windmills [23] and to produce internal magnetic fields in carbon nanotube solenoids [24] . In each of these examples, the underlying lattice is hexagonal, with two atoms per unit cell. In contrast nanotubes formed from gold, silver and platinum are derived from triangular lattices with one atom per unit cell and therefore it is of interest examine whether or not these effects are enhanced or diminished compared with their carbon counterparts.In this paper, to answer these questions, we examine chiral currents in gold nanotubes. Our choice of gold is in part motivated by the fact that chiral currents are expected to scale with the Fermi velocity of the underlying two-dimensional lattice, which in gold is approximately double that of graphene.A nanotube formed from a 2D lattice with periodic boundary conditions can be described by a chiral vector C = na 1 + ma 2 , which defines the circumference of the nanotube, where a 1 , a 2 are the lattice vectors and n, m are integers. The axis of the nanotube lies parallel to the longitudinal translation vector T (which is perpendicular the the chiral vector), whose magnitude is equal to the length of the nanotube unit cell, along the tube axis. To understand the currents carried by such a nanotu...

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“…Astonishingly enough several works hint at the fact that the conductance per atom row might decrease with the number of circumferential atoms and that the number of channels does not coincide with the number of atom rows coiling around these helical structures. 10,11 In this paper, we shed new light on the theoretical understanding of this phenomenon by means of both numerical and analytical calculations.…”

Section: Introductionmentioning

confidence: 99%

Scaling of the conductance in gold nanotubes

2006

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A new form of gold nanobridges has been recently observed in ultrahigh-vacuum experiments, where gold atoms rearrange to build helical nanotubes, akin in some respects to carbon nanotubes. The good reproducibility of these wires and their unexpected stability allow for conductance measurements and make them promising candidates for future applications. We present here a study of the transport properties of these nanotubes in order to understand the role of chirality and of the different orbitals in quantum transport observables. The conductance per atomic row shows a light decreasing trend as the diameter grows, which is also shown through an analytical formula based on a one-orbital model.

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Chiral Single-Wall Gold Nanotubes

Cited by 96 publications

References 22 publications

Atomic chains of group-IV elements and III-V and II-VI binary compounds studied by a first-principles pseudopotential method

Atomic chains of group-IV elements and III-V and II-VI binary compounds studied by a first-principles pseudopotential method

Chiral currents in gold nanotubes

Scaling of the conductance in gold nanotubes

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