Cohesive Energy of Noble Metals

Kambe, Kenjirô

doi:10.1103/physrev.99.419

Cited by 63 publications

(16 citation statements)

References 10 publications

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“…For gold deposited on GaAs substrates similar behavior was reported in Leem et al 2011 25 . This is not surprising as the cohesive energy of gold (3.82 eV) is larger than that of silver (2.95 eV) 26 . More detailed analysis of the dewetting process is difficult because the reliable data on the surface and interface energies for the Ag/GaAs(100) pair are still lacking 27 .…”

Section: Resultsmentioning

confidence: 94%

Fabrication and characterization of the noble metal nanostructures on the GaAs surface

Gladskikh

Toropov

et al. 2016

Nanophotonics VI

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Self-assembled silver, gold, and copper nanostructures on the monocrystalline GaAs (100) wafer surface were obtained via physical vapor deposition and characterized by optical reflection spectroscopy, scanning electron microscopy, and current-voltage curve measurements. Reflection spectra of the samples with Ag equivalent thicknesses of 2, 5, 7.5, and 10 nm demonstrated wide plasmonic bands in the visible range of spectra. Thermal annealing of the nanostructures led to narrowing of the plasmonic bands of Au and Ag nanostructures caused by major transformations of the film morphology. While the as prepared films predominantly had a small scale labyrinth structure, after annealing well-separated nanoislands are formed on the gallium arsenide surface. A clear correlation between films morphology and their optical and electrical properties is elucidated. Annealing of the GaAs substrate with Ag nanostructures at 100 °C under control of the resistivity allowed us to obtain and fix the structure at the percolation threshold. It is established that the samples at the percolation threshold possess the properties of resistance switching and hysteresis.

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Section: Resultsmentioning

confidence: 94%

Fabrication and characterization of the noble metal nanostructures on the GaAs surface

Gladskikh

Toropov

et al. 2016

Nanophotonics VI

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“…For gold deposited on GaAs substrates, similar behavior was reported in (Leem et al 2011). This is not surprising as the cohesive energy of gold (3.82 eV) is larger than that of silver (2.95 eV) (Kambe 1955). More detailed analysis of the dewetting process is difficult because the reliable data on the surface and interface energies for the Ag/GaAs (100) pair are still lacking (Lazar and Otyepka 2015).…”

Section: Resultsmentioning

confidence: 97%

Correlation between structural, optical, and electrical properties of self-assembled plasmonic nanostructures on the GaAs surface

Gladskikh

Toropov

et al. 2015

J Nanopart Res

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Self-assembled silver nanostructures on the industry-grade monocrystalline GaAs (100) wafer surface were obtained via physical vapor deposition and characterized by optical reflection spectroscopy, scanning electron microscopy, and current-voltage curve measurements. Reflection spectra of the samples with Ag equivalent thicknesses of 5, 7.5, and 10 nm demonstrated wide plasmonic bands in the visible range of spectra. Thermal annealing of the nanostructures led to narrowing of the plasmonic bands caused by major transformations of the film morphology. While the As prepared films predominantly had a small-scale labyrinth structure, after annealing wellseparated silver nanoislands are formed on the gallium arsenide surface. A clear correlation between films morphology and their optical and electrical properties is elucidated. Annealing of the GaAs substrate with Ag nanostructures at 100°C under control of the resistivity allowed us to obtain and fix the structure at the percolation threshold. It is established that the samples at the percolation threshold possess the properties of resistance switching and hysteresis.

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“…3 The BCS theory applies to the case of zero current density (in the absence of magnetic interactions). The extension of the theory to the case of finite current density has been considered by Bogoliubov 3 at the absolute zero of temperature and by Bardeen 4 at finite temperatures.…”

Section: Introductionmentioning

confidence: 99%

“…function; it has been applied to the alkali metals with good success, 2 and also to the noble metals. 3 A detailed calculation of the energy of beryllium was made by Herring and Hill, 4 and cruder calculations for other metals were carried out by Raimes. 5 Statistical methods have also been applied to a number of elements.…”

Section: Introductionmentioning

confidence: 99%

High-Current Superconductivity

Parmenter

1959

Phys. Rev.

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The Bardeen, Cooper, and Schrieffer theory of superconductivity is extended to the case of high current densities by explicitly including in the phonon-induced electron-electron attraction the modification of the phonon spectrum in a moving coordinate system. This modification results from the Doppler effect. In materials having cross-sectional dimensions of the order of the penetration depth, it is shown that at current densities of the order of 10 9 amp/cm 2 the superconducting state is stable relative to the normal state, this holding both in superconducting metals and in metals ordinarily not considered superconducting at all. For this high-current state, it appears possible to obtain superconducting transition temperatures as high as room temperature. Means for achieving such an effect experimentally are discussed. making the approximation. As we shall see in the following section, however, the Doppler effect on the phonon spectrum is crucial to the very existence of the highcurrent range of superconductivity. Because of the Doppler effect, the phonon-induced attraction between electrons rises rapidly as the electronic drift velocity approaches the speed of sound. In the high-current region of superconductivity the effective energy gap may be several orders of magnitude larger than the gap in the low-current region. Thus it is not unreasonable to expect room-temperature superconductivity in the highcurrent range.The theory indicates that high-current superconductivity should occur not only in superconducting materials but also (even more strikingly) in metals such as copper which are ordinarily not superconductors at all.In Sec. Ill we will discuss some of the difficulties in actually getting high-current superconductivity experimentally. A particular experimental arrangement for achieving it will be proposed. The technological importance of the effect will be discussed briefly. II. THEORYThe dc current density J-ne\ in a superconducting metal can be broken into two parts, a conduction current density J c = (ne/m)po and a diamagnetic current densityHere n is the density of superconducting electrons, v their mean velocity, m their effective mass, po their mean momentum, and A the vector potential, J<* represents that portion of the current resulting from magnetic interactions, whereas J c represents the current that would occur if there were no magnetic interactions or, more specifically, if the velocity of light c were set equal to infinity without changing the boundary conditions which specify the total current flowing through the superconductor. This means that the total current flowing across a cross-sectional area of the conductor must result entirely from J c ; the integral of J^ over the area vanishes. Jd is solenoidal (VXJ^O), whereas J c 1390

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Cohesive Energy of Noble Metals

Cited by 63 publications

References 10 publications

Fabrication and characterization of the noble metal nanostructures on the GaAs surface

Fabrication and characterization of the noble metal nanostructures on the GaAs surface

Correlation between structural, optical, and electrical properties of self-assembled plasmonic nanostructures on the GaAs surface

High-Current Superconductivity

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