Theory and Application for the Scanning Tunneling Microscope

Tersoff, J.; Hamann, D. R.

doi:10.1103/physrevlett.50.1998

Cited by 2,410 publications

(1,641 citation statements)

References 7 publications

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“…Metal adatoms and deprotonated TMA molecules were positioned on the upper surface of the slab and were structurally relaxed according to the Hellmann-Feynman forces. STM images were simulated by means of the Tersoff-Hamann method, [33] i.e. by a spatially resolved DOS integrated in energy from a bias potential (-1.0 eV) to the Fermi energy.…”

Section: Methodsmentioning

confidence: 99%

Templated Growth of Metal–Organic Coordination Chains at Surfaces

et al. 2005

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Metal-organic coordination networks (MOCNs) formed by coordination bonding between metallic centers and organic ligands can be efficiently engineered to exhibit specific magnetic, electronic, or catalytic properties. [1][2][3][4][5][6] Instead of depositing prefabricated MOCNs onto surfaces, it has been recently shown that two dimensional (2D) MOCNs can be directly grown at metal surfaces in ultra high vacuum (UHV), thus creating highly regular 2D networks of metal atoms. [7][8][9][10][11][12] These grids have been pointed out to be potentially relevant for devices involving sensing, switching, and information storage. [13,14] We show here that this approach offers the additional advantage to predefine the MOCN geometry by using the substrate as template to direct the formation of novel 1D metal-organic coordination chains (MOCCs).The templating role of substrates is well known in the field of surface epitaxial growth. [15][16][17][18][19] Among the highly anisotropic substrates, the Cu(110) surface is one of the most common (Figure 1a and b). In order to evidence its strong 1D templating effect on organic molecules, a ligand with a triangular symmetry was selected: 1,3,5-benzenetricarboxylic acid (trimesic acid, TMA, Figure 1c). In fact, the 3-fold rotation symmetry supports the formation of hexagonal 2D and 3D architectures, [20][21][22] therefore strongly disfavoring the linear geometry. On the isotropic Cu(100) surface, TMA forms 0D carboxylate complexes and 2D networks. [9,10] The UHV deposition of TMA on Cu(110) at 300 K results in the formation of 1D chains along the 110 direction, as observed by STM. This deposition temperature is high enough to * * The authors wish to acknowledge Nian Lin, Magalí Lingenfelder, Alexander Schneider and Giacinto Scoles for fruitful discussions, HPC-EUROPA (project #506079) and INFM Progetto Calcolo Parallelo for computer resources.

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Section: Methodsmentioning

confidence: 99%

Templated Growth of Metal–Organic Coordination Chains at Surfaces

et al. 2005

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“…45 The theory of Tersoff and Hamann for the STM, 58 on the other hand, was not developed for superconductors. The approach of Ref.…”

Section: A Stm Tunneling Conductance and Ldosmentioning

confidence: 99%

Strong-coupling analysis of scanning tunneling spectra in Bi2Sr2Ca2Cu
Berthod
¹
,
Fasano
²
,
Maggio-Aprile
³

et al. 2013
Phys. Rev. B

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We study a series of spectra measured in the superconducting state of optimally doped Bi 2 Sr 2 Ca 2 Cu 3 O 10+δ (Bi-2223) by scanning tunneling spectroscopy. Each spectrum, as well as the average of spectra presenting the same gap, is fitted using a strong-coupling model taking into account the band structure, the BCS gap, and the interaction of electrons with the spin resonance. After describing our measurements and the main characteristics of the strong-coupling model, we report the whole set of parameters determined from the fits, and we discuss trends as a function of the gap magnitude. We also simulate angle-resolved photoemission spectra, and compare with recent experimental results.

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“…Imaging is performed in the constant current mode, whereas the sample electronic properties are deduced from differential conductance (dI/dV) measurements applying lock-in technique. According to the Tersoff-Hamann theory for vacuum tunneling, 13 The Mo support is cleaned by alternating cycles of Ar + sputtering and annealing to 1800 K and afterwards exposed to 50 L O 2 to produce an oxygen-induced p(2×3) precursor structure.…”

Section: Experiments and Theorymentioning

confidence: 99%

Realization of an atomic sieve: Silica on Mo(112)

et al. 2009

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The adsorption of Pd, Ag and Au atoms on a porous silica film on Mo(112) is investigated by scanning tunneling microscopy and density functional theory. While Pd atoms are able to penetrate the holes in the silica top-layer with virtually no barrier, Ag atoms experience an intermediate barrier value and Au atoms are completely unable to pass the oxide surface. The penetration probability does not correlate with the effective atom size, but depends on their electronic structure. Whereas Pd with an unoccupied valence s-orbital has a low penetration barrier, Ag and Au atoms with occupied s-states experience a substantial repulsion with the filled oxide states, leading to a higher barrier for penetration. In the case of Ag, the barrier height can be temporally lowered by promoting the Ag 5s-electron into the support. The Mo-supported silica film can thus be considered as a primitive form of an atomic sieve whose selectivity is controlled by the electronic structure of the adatoms.

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Theory and Application for the Scanning Tunneling Microscope

Cited by 2,410 publications

References 7 publications

Templated Growth of Metal–Organic Coordination Chains at Surfaces

Templated Growth of Metal–Organic Coordination Chains at Surfaces

Strong-coupling analysis of scanning tunneling spectra in Bi2Sr2Ca2Cu
Berthod
¹
,
Fasano
²
,
Maggio-Aprile
³

et al. 2013
Phys. Rev. B

Realization of an atomic sieve: Silica on Mo(112)

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Theory and Application for the Scanning Tunneling Microscope

Cited by 2,410 publications

References 7 publications

Templated Growth of Metal–Organic Coordination Chains at Surfaces

Templated Growth of Metal–Organic Coordination Chains at Surfaces

Strong-coupling analysis of scanning tunneling spectra in Bi2Sr2Ca2CuBerthod1, Fasano2, Maggio-Aprile3 et al. 2013Phys. Rev. B

Realization of an atomic sieve: Silica on Mo(112)

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Strong-coupling analysis of scanning tunneling spectra in Bi2Sr2Ca2Cu
Berthod
¹
,
Fasano
²
,
Maggio-Aprile
³

et al. 2013
Phys. Rev. B