Multi-Probe Characterization of 1D and 2D Nanostructures Assembled on Ge(001) Surface by Gold Atom Deposition and Annealing

Wojtaszek, Mateusz; Kolmer, Marek; Godlewski, Szymon; Budzioch, Janusz; Such, Bartosz; Szymoński, Marek

doi:10.1007/978-3-642-28172-3_11

Cited by 4 publications

(3 citation statements)

References 16 publications

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“…Even though the metallic contacts to the Au/Ge(001) surface may be farther apart, a local sensitive probe can study the electronic properties in the vicinity of the domain boundaries. We know from previous experiments that the Au/Ge(001) surface exhibits a two dimensional conductance channel on a micrometre-scale averaging across several Au-reconstructed 1D domains [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

Probing the electronic transport on the reconstructed Au/Ge(001) surface

Kaspers¹,

Bernhart²,

Nikiel³

et al. 2014

Beilstein J. Nanotechnol.

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SummaryBy using scanning tunnelling potentiometry we characterized the lateral variation of the electrochemical potential µec on the gold-induced Ge(001)-c(8 × 2)-Au surface reconstruction while a lateral current flows through the sample. On the reconstruction and across domain boundaries we find that µec shows a constant gradient as a function of the position between the contacts. In addition, nanoscale Au clusters on the surface do not show an electronic coupling to the gold-induced surface reconstruction. In combination with high resolution scanning electron microscopy and transmission electron microscopy, we conclude that an additional transport channel buried about 2 nm underneath the surface represents a major transport channel for electrons.

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Section: Introductionmentioning

confidence: 99%

Probing the electronic transport on the reconstructed Au/Ge(001) surface

Kaspers¹,

Bernhart²,

Nikiel³

et al. 2014

Beilstein J. Nanotechnol.

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“…Nevertheless, with standard 2-probe [8,15,16,23,27] or 4-probe [4,7,11,18,20,[23][24][25] methods of measurements characterization of a wide range of fundamental surface electronic properties has been realized. This includes, but is not only limited to understanding of: surface conductance channels [4,18,20,24,25,35], surface conductance anisotropy [7,24] or surface electronic bang-gap [16]. These standard multi-probe methods have been also applied to determine conductance of self-assembled molecular structures [11] or transport properties of graphene nano-constrains [23,27].…”

Section: Introductionmentioning

confidence: 99%

Two-probe STM experiments at the atomic level

Kolmer

Olszowski

Zuzak

et al. 2017

J. Phys.: Condens. Matter

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Direct characterization of planar atomic or molecular scale devices and circuits on a supporting surface by multi-probe measurements requires unprecedented stability of single atom contacts and manipulation of scanning probes over large, nanometer scale area with atomic precision. In this work, we describe the full methodology behind atomically defined two-probe scanning tunneling microscopy (STM) experiments performed on a model system: dangling bond dimer wire supported on a hydrogenated germanium (0 0 1) surface. We show that 70 nm long atomic wire can be simultaneously approached by two independent STM scanners with exact probe to probe distance reaching down to 30 nm. This allows direct wire characterization by two-probe I-V characteristics at distances below 50 nm. Our technical results presented in this work open a new area for multi-probe research, which can be now performed with precision so far accessible only by single-probe scanning probe microscopy (SPM) experiments.

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“…[6][7][8][9][10][11][12][13] The threshold annealing temperature for the formation of c(8 × 2) Au/Ge(001) reconstruction, which corresponds to the gold-induced chain domain, has been determined to be 573 K, and the dewetting process of Au from this reconstruction to Au nanoislands occurs above 665 K. 9 For a higher coverage of gold, exceeding 1 monolayer (ML), gold nanoclusters appear together with the nanowires on the Ge(001) substrate surface. [13][14][15][16][17][18][19] The Au nanoclusters have different shapes depending on the annealing conditions, 14 but to our knowledge, no systematic studies on their morphology changes upon annealing have been performed.…”

Section: Introductionmentioning

confidence: 99%

Dynamics of thermally induced assembly of Au nanoislands from a thin Au layer on Ge(001)

et al. 2016

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Dynamics of the morphology changes upon post deposition annealing of a thin film of 6 ML Au deposited on (2x1) reconstructed Ge(001) surface was studied in the systematic way by scanning electron and atomic force microscopes. It has been found that annealing of the initial, continuous Au layer leads to the development of which are crystalline and epitaxial to the Ge(001) substrate surface. The nanoislands formed at annealing temperatures lower than the bulk eutectic temperature for the Au-Ge system (634 K) are rectangular, with flat top, while the nanoislands developed by annealing at temperatures higher than the bulk eutectic temperature have more complex, octagonal shapes. Moreover, the octagonal Au nanoislands are nearly half-buried in the Ge substrate and surrounded by a crystalline Ge rim.

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Multi-Probe Characterization of 1D and 2D Nanostructures Assembled on Ge(001) Surface by Gold Atom Deposition and Annealing

Cited by 4 publications

References 16 publications

Probing the electronic transport on the reconstructed Au/Ge(001) surface

Probing the electronic transport on the reconstructed Au/Ge(001) surface

Two-probe STM experiments at the atomic level

Dynamics of thermally induced assembly of Au nanoislands from a thin Au layer on Ge(001)

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