Electronic transport in molecular devices: the role of coherent and incoherent electron–phonon scattering

ABSTRACTIn this work we present a theoretical study of the transport coefficients of n-type PbTe. The electronic transport coefficients are calculated using the isotropic-nearly-free-electron approximation, including the effect of band non-parabolicity on electron-phonon scattering. The lattice thermal transport coefficient is computed by employing the isotropic continuum model for the dispersion relation for acoustic as well as optical phonon branches, an isotropic anharmonic continuum model for crystal anharmonicity, and the single-mode relaxation time scheme. The role of transverse optical (TO) phonon modes in anharmonic interactions will be discussed in detail.

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Two OPW calculations of electronic transport properties of copper below 20 K

Canadian Journal of Physics ◽

10.1139/p77-071 ◽

1977 ◽

Vol 55 (6) ◽

pp. 521-527 ◽

Cited By ~ 7

Author(s):

M. E. Brett ◽

J. E. Black

Keyword(s):

Fermi Surface ◽

Electronic Transport ◽

Phonon Scattering ◽

Electronic States ◽

Preliminary Calculation ◽

First Case ◽

Cone Model ◽

The Matrix ◽

Total Resistivity ◽

Electron Phonon Scattering

The results of numerical calculations of the electrical and thermal lattice resistivity of copper at temperatures (T) below 20 K are presented. We have calculated the matrix element for electron–phonon scattering using two OPW electronic states and the Born – von Karman method of determining the phonon frequencies and eigenvectors. We have used the eight-cone model of the Fermi surface in which necks intersecting the Brillouin zone and the spherical belly regions are both present.The lattice electrical resistivity is calculated for two limiting cases. In the first case the resistivity is that expected when no impurities are present in the metal. In the second case the impurity resistivity is taken to dominate the lattice resistivity. We show that the T3 behaviour of lattice resistivity recently observed experimentally below 10 K can be understood as occurring when the temperature is lowered and the total resistivity moves from the lattice dominated to impurity dominated case.The results of a preliminary calculation, in which a more exact Fermi surface and 27 APW electronic states were used, are also described.

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Investigating the role of electron—phonon scattering in the measurement of photoelectric thresholds

Journal of Electron Spectroscopy and Related Phenomena ◽

10.1016/0368-2048(75)80041-7 ◽

1975 ◽

Vol 6 (4) ◽

pp. 321-323

Author(s):

I. Abbati ◽

L. Braicovich ◽

B. De Michelis ◽

A. Fasana

Keyword(s):

Phonon Scattering ◽

Electron Phonon Scattering

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Role of electron-phonon scattering in the production of absorption bands in electron microscopy

10.1117/12.299580 ◽

1998 ◽

Author(s):

O. A. Podsvirov

Keyword(s):

Electron Microscopy ◽

Phonon Scattering ◽

Absorption Bands ◽

Electron Phonon Scattering

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ELECTRON–PHONON SCATTERING AND ELECTRONIC TRANSPORT IN LAYERED STRUCTURES

International Journal of Modern Physics B ◽

10.1142/s021797920000008x ◽

2000 ◽

Vol 14 (01) ◽

pp. 85-90

Author(s):

M. AUSLOOS ◽

K. DURCZEWSKI

Keyword(s):

Electronic Transport ◽

Phonon Scattering ◽

Electrical Power ◽

Electron Gas ◽

Three Dimensional ◽

Layered Materials ◽

Normal Phase ◽

Phase Temperature ◽

Electron Phonon Scattering ◽

Degenerate Electron Gas

The two-dimensional degenerate electron gas with electron–phonon scattering is analyzed. The normal-phase temperature dependence of the electrical resistivity and the thermo-electrical power are calculated, based on the electron–phonon scattering and other usual ones. Results are compared to those of earlier studies on three-dimensional phonon-limited scattering. Comparison is qualitatively made for several layered materials of interest (MOS, heterostructures, etc.). It occurs that the theory does not seem to apply to YBCO-like Tc superconductors which have a too low Fermi energy with respect to the Debye temperature.

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