Atomic Nanowires on the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>Pt</mml:mi><mml:mo>/</mml:mo><mml:mi>Ge</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mn>001</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:math>Surface: Buried Pt-Ge Versus Top Pt-Pt Chains

Stekolnikov, A. A.; Bechstedt, F.; Wiśniewski, Marek; Schäfer, J.; Claessen, R.

doi:10.1103/physrevlett.100.196101

Cited by 46 publications

(57 citation statements)

References 16 publications

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“…Pt atoms induce narrow nanowires on Ge(001), see figure 1 (discussed in detail below), which exhibits sharply localized states [35]. Density functional theory (DFT) relates this to Pt d-orbitals, which lead to a marginal tunneling conductivity at room temperature [36]. Gold atoms also grow in self-organized manner, and linear reconstructions can be achieved [37].…”

Section: Systems On the Ge(001) Surfacementioning

confidence: 99%

Self-organized atomic nanowires of noble metals on Ge(001): atomic structure and electronic properties

et al. 2009

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Self-organized atomic nanowires of noble metals on Ge(001): atomic structure and electronic properties Abstract. Atomic structures of quasi-one-dimensional (1D) character can be grown on semiconductor substrates by metal adsorption. Significant progress concerning study of their 1D character has been achieved recently by condensing noble metal atoms on the Ge(001) surface. In particular, Pt and Au yield high quality reconstructions with low defect densities. We report on the self-organized growth and the long-range order achieved, and present data from scanning tunneling microscopy (STM) on the structural components. For Pt/Ge(001), we find hot substrate growth is the preferred method for self-organization. Despite various dimerized bonds, these atomic wires exhibit metallic conduction at room temperature, as documented by low-bias STM. For the recently discovered Au/Ge(001) nanowires, we have developed a deposition technique that allows complete substrate coverage. The Au nanowires are extremely well separated spatially, exhibit a continuous 1D charge density, and are of solid metallic conductance. In this review, we present structural details for both types of nanowires, and discuss similarities and differences. A perspective is given for their potential to host a 1D electron system. The ability to condense different noble metal nanowires demonstrates how atomic control of the structure affects the electronic properties.

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Section: Systems On the Ge(001) Surfacementioning

confidence: 99%

Self-organized atomic nanowires of noble metals on Ge(001): atomic structure and electronic properties

et al. 2009

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“…The assumption of zero diffusion into the bulk cannot be used for the second data set, due to relatively high amount of deposited Pt, as is shown by ρ Pt (α 2 ) in Table III. Instead, one can assume the Pt concentration in the α-terrace to be the same as the one found for the first set, and estimate the amount of Pt diffusing into the bulk, which is shown in Table III 144,145 , (e) PINW model by Vanpoucke et al 137,138,146 , and (f) the IPCM by Tsay. 147 those found for the α-terrace, and could thus be considered reasonable.…”

Section: Experimental Hints: Pt Deposition and Structurementioning

confidence: 99%

“…Furthermore, every second Ge-dimer of every second dimer row is replaced by a single Ge atom. Figure 3e Tetramer-dimer-chain (TDC) Based on their abinitio calculations, Stekolnikov et al 144,145 proposed a model showing a significant reconstruction of the surface top-layers. In this model, shown in Fig.…”

Section: Pt Nanowire Model (Pnm)mentioning

confidence: 99%

Modeling 1D structures on semiconductor surfaces: synergy of theory and experiment

Vanpoucke

2014

J. Phys.: Condens. Matter

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Atomic scale nanowires attract enormous interest in a wide range of fields. On the one hand, due to their quasi-one-dimensional nature, they can act as a experimental testbed for exotic physics: Peierls instability, charge density waves, and Luttinger liquid behavior. On the other hand, due to their small size, they are of interest for future device applications in the micro-electronics industry, but also for applications regarding molecular electronics. This versatile nature makes them interesting systems to produce and study, but their size and growth conditions push both experimental production and theoretical modeling to their limits. In this review, modeling of atomic scale nanowires on semiconductor surfaces is discussed focusing on the interplay between theory and experiment. The current state of modeling efforts on Pt-and Au-induced nanowires on Ge (001) is presented, indicating their similarities and differences. Recently discovered nanowire systems (Ir, Co, Sr) on the Ge(001) surface are also touched upon. The importance of scanning tunneling microscopy as a tool for direct comparison of theoretical and experimental data is shown, as is the power of density functional theory as an atomistic simulation approach. It becomes clear that complementary strengths of theoretical and experimental investigations are required for successful modeling of the atomistic nanowires, due to their complexity.

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“…It is interesting to note that the T d1 structure shows, after relaxation, roughly the same geometry Stekolnikov et al [95] propose as NW geometry. In Sec 4.4.2 we will address this point in more detail.…”

mentioning

confidence: 81%

“…[95,99] Stekolnikov et al present a careful DFT study of a set of Ge surfaces containing 0.25 ML of Pt. By comparing the formation energy of those structures and a comparison of calculated STM images with experimental STM images they conclude their TDC structure to represent the geometry of the observed NW arrays.…”

Section: Comparison To Literaturementioning

confidence: 99%

An initio study of Pt induced nanowires on Ge(001)

Vanpoucke

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Atomic Nanowires on thePt/Ge(001)Surface: Buried Pt-Ge Versus Top Pt-Pt Chains

Cited by 46 publications

References 16 publications

Self-organized atomic nanowires of noble metals on Ge(001): atomic structure and electronic properties

Self-organized atomic nanowires of noble metals on Ge(001): atomic structure and electronic properties

Modeling 1D structures on semiconductor surfaces: synergy of theory and experiment

An initio study of Pt induced nanowires on Ge(001)

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