Energy band structure of Ca, Sr and Ba

Chatterjee, S.; Chakraborti, Dibyashree

doi:10.1088/0305-4608/1/5/317

Cited by 22 publications

(4 citation statements)

References 16 publications

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“…As we noted in the model section, the simulations are performed for the single gamma point. In the case of strontium, it produces a small band gap of ~0.15 eV, because the dispersion curves are supposed to meet at the L point in the Brillouin zone [58], which is not sufficiently sampled for the supercells of our size (500 atoms in this case). Thus, one can expect a reliable description of the coupling parameter only at electronic temperatures above the value of this artificial band gap, which corresponds to Te ~ 2-3 kK.…”

Section: Figure 2 Electron-phonon Coupling Parameter In: (A) Copper C...mentioning

confidence: 99%

Electron-phonon coupling in metals at high electronic temperatures

2020

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Even though electron-phonon coupling is one of the most important parameters governing material evolution after ultrafast energy deposition it remains the most unexplored one. In this work we apply the dynamical coupling approach to calculate the nonadiabatic electron-ion energy exchange in nonequilibrium solids with the electronic temperature high above the atomic one. It is implemented into the tight-binding molecular dynamics code and used to study electron-phonon coupling in various elemental metals. The approach developed is a universal scheme applicable to electronic temperatures up to a few electron volts and to arbitrary atomic configurations and dynamics. We demonstrate that the calculated electron-ion (electron-phonon) coupling parameter agrees well with the available experimental data in the high-electronic-temperature regime, validating the model. The following materials are studied here: fcc

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Section: Figure 2 Electron-phonon Coupling Parameter In: (A) Copper C...mentioning

confidence: 99%

Electron-phonon coupling in metals at high electronic temperatures

2020

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“…The peaks of Ca and Sr at 4.3 and 4.1 eV for 8 > 5 x 10-4 rad result from interband transitions which can be derived from the band structure (Phillips 1966, Chatterjee andChakraborti 1971, Altmann et a1 1971). (ii) In figure 3 there are shown measured spectra for the alkaline earths in an energy range up to about 12 eV (thickness of the metal film about 500 A).…”

Section: 2 Discussion Of Some Lossesmentioning

confidence: 99%

Electron-energy-loss experiments on calcium, strontium and barium

Langkowski¹

1975

J. Phys. D: Appl. Phys.

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Electron-energy-loss experiments on thin films of Ca, Sr and Ba performed with 50 keV electrons are reported. The energy loss function is derived from the spectra and further the dielectric functions epsilon 1+i epsilon 2 of these metals are determined in the energy range of 2-50 eV. The dispersion of the losses as well as the dependence of its half-widths on the wave-vector has been determined. The results are compared with those of other authors.

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“…The composite wave variational formalism of the APW method is ideally suited for this purpose, as this correction is automatically taken into account through the inclusion of the Fourier coefficient of the potential. The method has already been used successfully for various metals (Chatterjee and Sen 1967, 1968, Chatterjee and Chakravarty 1971, Chatterhee and Sinha 1975 and compounds (Chatterjee et ul 1972). The relevant matrix elements for compounds containing two or more dissimilar atoms per unit cell have already been given by Chatterjee and Sinha (1975).…”

Section: Outline Of the Methodsmentioning

confidence: 99%

Formation of self-focusing filaments in harmonic generation under conditions of coherent two-photon interaction between optical pulses and resonant media

Poluéktov¹,

Nazarkin²

1982

Sov. J. Quantum Electron.

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The composite wave variational version of the APW method has been used in conjunction with the LCAO interpolation scheme to compute the energy bands and the joint density of states of the compounds BeS, BeSe and BeTe at various symmetry points and axes of the Brillouin zone. From these computed bands, all three materials are found to be semiconductors having band gaps of 6.10 eV, 4.75 eV and 1.49 eV, respectively. From the joint density of state characteristics, various optical transitions have also been predicted. The results have been favourably compared with those of Stukel. Since BeTe is found to be a small-gap semiconductor, its possible technological importance has also been emphasized.

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Energy band structure of Ca, Sr and Ba

Cited by 22 publications

References 16 publications

Electron-phonon coupling in metals at high electronic temperatures

Electron-phonon coupling in metals at high electronic temperatures

Electron-energy-loss experiments on calcium, strontium and barium

Formation of self-focusing filaments in harmonic generation under conditions of coherent two-photon interaction between optical pulses and resonant media

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