2008
DOI: 10.1038/nmat2209
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Charge-order fluctuations in one-dimensional silicides

Abstract: Metallic nanowires are of great interest as interconnects in future nanoelectronic circuits. They also represent important systems for understanding the complexity of electronic interactions and conductivity in one-dimension. We have fabricated exceptionally long and uniform YSi 2 nanowires via self-assembly of yttrium atoms on Si(001). The thinnest wires represent one of the closest realizations of the isolated Peierls chain, exhibiting van-Hove type singularities in the onedimensional density of states and c… Show more

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Cited by 74 publications
(84 citation statements)
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“…The inhomogeneity pattern does not have spatial long-range order as indicated by the fast Fourier transformation (not shown), nor obvious preferable orientation. This short-range charge order resembles the spatial charge fluctuation in YSi 2 nanowires [23]. The evolution of the charge inhomogeneity as a function of the sample bias is also investigated.…”
mentioning
confidence: 84%
“…The inhomogeneity pattern does not have spatial long-range order as indicated by the fast Fourier transformation (not shown), nor obvious preferable orientation. This short-range charge order resembles the spatial charge fluctuation in YSi 2 nanowires [23]. The evolution of the charge inhomogeneity as a function of the sample bias is also investigated.…”
mentioning
confidence: 84%
“…The large and still growing interest in silicides, i.e., binary compounds of Si with electropositive elements like transition metals (TM) or rare earth (RE) elements, is driven by their unique properties for applications as well as for addressing fundamental questions [1][2][3][4][5][6]. For instance, novel ultralow resistivity (i.e., ρ 10 μ cm) TM-based silicides are intended to be used as interconnects or gate electrodes for the next generation CMOS technology [7][8][9][10][11].…”
Section: Introductionmentioning
confidence: 99%
“…These concepts of strainor step-mediated growth are highly tempting since lithographic problems and limitations are entirely circumvented and, moreover, the metallic wires serve as important model systems to understand the effects of electronic correlation and instabilities characteristic for one-dimensional (1D) physics [4,18]. As a recent example, YSi 2 nanowires with cross sections as small as 0.5 nm 2 were shown to reveal van Hove singularities, a clear benchmark for a 1D electronic structure.…”
Section: Introductionmentioning
confidence: 99%
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“…Arguably, the most interesting cases are those in which deposited atoms self-organize into a novel nanophase material. Interesting examples include the formation of optically active quantum dots and quantum-dot superlattices in Si/Ge 1 and PbSe/PbTe heteroepitaxy, 2 metallic nanowires in silicide heteroepitaxy, 3,4 or the formation of atomically smooth metal films on semiconductor surfaces. 5,6 While the formation of wires and dots appears to be driven by a classical strain relaxation mechanism, the formation of atomically-smooth metal films is often driven by quantum-mechanical confinement.…”
Section: Introductionmentioning
confidence: 99%