Minimum energy 2D patterns of atoms adsorbed on a hexagonal lattice

Arce, Humberto; Mochán, W. Luis; Gutiérrez, J.Jesús

doi:10.1016/0039-6028(95)01011-4

Cited by 7 publications

(4 citation statements)

References 35 publications

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“…Superconducting vortices either in Josephson junction arrays [69,70] or superconducting layers in the presence of periodic pinning [71][72][73][74][75] have been studied extensively by Monte Carlo simulations and analytical approaches [76][77][78][79][80][81][82][83][84][85][86] as well as molecular dynamics simulations [87,88]. Adsorbed atoms on a crystalline surface [89][90][91][92][93][94], colloidal systems on templates [95], organic conductors [96,97], as well as magnetic bubble arrays [98] also exhibit CLG characteristics. Recently, the configuration of a system of polarons in 1T-TaS 2 at very low temperatures has been investigated using the CLG model.…”

Section: Introductionmentioning

confidence: 99%

Configurational electronic states in layered transition metal dichalcogenides

et al. 2019

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Mesoscopic irregularly ordered and even amorphous self-assembled electronic structures were recently reported in two-dimensional metallic dichalcogenides (TMDs), created and manipulated with short light pulses or by charge injection. Apart from promising new all-electronic memory devices, such states are of great fundamental importance, since such aperiodic states cannot be described in terms of conventional charge-density-wave (CDW) physics. In this paper, we address the problem of metastable mesoscopic configurational charge ordering in TMDs with a sparsely filled charged lattice gas model in which electrons are subject only to screened Coulomb repulsion. The model correctly predicts commensurate CDW states corresponding to different TMDs at magic filling fractions = / / / / / f 1 3, 1 4, 1 9, 1 13, 1 16.mDoping away from f m results either in multiple neardegenerate configurational states, or an amorphous state at the correct density observed by scanning tunnelling microscopy. Quantum fluctuations between degenerate states predict a quantum charge liquid at low temperatures, revealing a new generalized viewpoint on both regular, irregular and amorphous charge ordering in transition metal dichalcogenides.

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Section: Introductionmentioning

confidence: 99%

Configurational electronic states in layered transition metal dichalcogenides

et al. 2019

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“…There is clear evidence for the importance of such lateral interactions in previous work. 4,5 In the case of potassium adsorption on Pt͑111͒ potassium adlayers have been found to be structured in such a way as to minimise dipole-dipole interactions; 4 likewise sodium introduction to a Pt͑111͒ surface un-z E-mail: I.Metcalfe@newcastle.ac.uk der conditions of electrochemical promotion ͑imaged via STM͒ has been seen to result in the formation of ordered surface structures. 5 Now we must make some assumptions about the structure of the double layer to proceed ͑the fact that Fleig and Jamnik do not need to consider the structure of the double layer when introducing a new surface charge is in fact a further clear demonstration that their analysis is incorrect͒.…”

Section: Issuementioning

confidence: 99%

Comment on “Work Function Changes of Polarized Electrodes on Solid Electrolytes” [J. Electrochem. Soc., 152, E138 (2005)]

Metcalfe

2006

J. Electrochem. Soc.

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“…The structures corresponding to submonolayer coverages of K were suggested as a possible model of the transition from the p(2 × 2) phase, which is locally formed by potassium adsorbates at a coverage of 0.25 ML, to the ( [22,23,28,29]. Such a model can be interpreted as resulting from minimization of the electrostatic K-K repulsion [27,30] which is caused by a charge transfer to the Pt surface and, hence, by interaction between the partially charged K adatoms. In agreement with this model, K occupies the threefold symmetrical hollow adsorption site.…”

Section: Introductionmentioning

confidence: 99%

Comparative study of vibrations in submonolayer structures of potassium on Pt(111)

Rusina¹,

Eremeev²,

Borisova³

et al. 2012

J. Phys.: Condens. Matter

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We present results of a comparative study of the vibrational spectrum and local density of phonon states in ordered p(2 x 2) and (√3 x √3)R30° structures formed by potassium atoms on the Pt(111) surface. The calculations were performed with tight-binding interatomic interaction potentials. It was found that the mode associated with vertical displacements of K adatoms has an energy of about 20 meV in both K structures. The strength and energy of this mode slightly decreases with increasing coverage. This result is in good agreement with available experimental data. As in time-resolved second harmonic generation measurements, we observed low frequency modes for both structures considered, which are caused by the interaction of potassium with the second layer of the substrate.

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Minimum energy 2D patterns of atoms adsorbed on a hexagonal lattice

Cited by 7 publications

References 35 publications

Configurational electronic states in layered transition metal dichalcogenides

Configurational electronic states in layered transition metal dichalcogenides

Comment on “Work Function Changes of Polarized Electrodes on Solid Electrolytes” [J. Electrochem. Soc., 152, E138 (2005)]

Comparative study of vibrations in submonolayer structures of potassium on Pt(111)

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