Electron-phonon scattering in transport properties of InSe single crystals

1985 ◽  
Vol 6 (5) ◽  
pp. 383-392 ◽  
Author(s):  
R. Cingolani ◽  
L. Vasanelli ◽  
A. Rizzo
Keyword(s):  
Transport Properties ◽  
Single Crystals ◽  
Phonon Scattering ◽  
Electron Phonon Scattering

The transport properties of the cubic alkaline earths Ca, Sr, and Ba

1978 ◽  
Vol 56 (1) ◽  
pp. 161-174 ◽  
Author(s):  
J. G. Cook ◽  
M. J. Laubitz
Keyword(s):  
Large Deviations ◽  
Transport Properties ◽  
Thermoelectric Power ◽  
Phonon Scattering ◽  
Thermal Resistivity ◽  
Elastic Electron ◽  
Phonon Drag ◽  
Alkaline Earths ◽  
Conductivity Function ◽  
Electron Phonon Scattering

The electrical resistivity (ρ), thermoelectric power(S), and thermal conductivity (κ) of two Sr samples and two Ba samples have been determined from 30 to 300 K. Large deviations from Matthiessen's rule (DMR) were observed. The estimated transport properties for ideally pure Sr and Ba indicate that these elements, like Ca, show large deviations from the Bloch–Gruneisen form for ρ(T) at all temperatures, large and positive diffusion thermopowers with a negative phonon-drag contribution, and large deviations from the Wiedemann–Franz relationship (DWFR). In these respects, they are much more like the transition metals than the monovalent metals.In the second, analytical, portion of the paper we study the DWFR in some detail. First, the effect of lattice conduction is estimated, and found to be large. Then, a function X(E) of the electron energy, closely related to the conventional conductivity function σ(E), is estimated from the ρ and S data now available for Ca, Sr, and Ba above 300 K, and used to compute S and the Lorenz function for elastic electron–phonon scattering below 300 K. Comparison with the experimental data indicates that the energy dependence of the electron parameters is responsible for the electronic DWFR, and effects the diffusion thermoelectric power. Such 'band effects' may also be seen in the thermal resistivity due to inelastic scattering in at least Sr. Regrettably, we are not able to explain the observed DMR.

CARBON NANOTUBES AS A PERFECTLY CONDUCTING CYLINDER

2003 ◽  
Vol 13 (03) ◽  
pp. 849-871 ◽  
Author(s):  
TSUNEYA ANDO
Keyword(s):  
Carbon Nanotubes ◽  
Transport Properties ◽  
Phonon Scattering ◽  
Tight Binding ◽  
Point Of View ◽  
Potential Range ◽  
Theoretical Point ◽  
Binding Model ◽  
Long Wavelength ◽  
Electron Phonon Scattering

A brief review is given on electronic and transport properties of carbon nanotubes mainly from a theoretical point of view. The topics include a description of electronic states in a tight-binding model and in an effective-mass or k · p scheme. Transport properties are discussed including absence of backward scattering except for scatterers with a potential range smaller than the lattice constant, its extension to multi-bands cases, and long-wavelength phonons and electron-phonon scattering.

Estimating carrier relaxation times in the Ba8Ga16Ge30 clathrate in the extrinsic regime

2017 ◽  
Vol 19 (4) ◽  
pp. 3010-3018 ◽  
Author(s):  
Robert L. González-Romero ◽  
A. Antonelli
Keyword(s):  
Grain Boundaries ◽  
Relaxation Process ◽  
Single Crystals ◽  
Phonon Scattering ◽  
Relaxation Times ◽  
Carrier Relaxation ◽  
Electron Phonon Scattering

The carrier relaxation process in single crystals is dominated by electron–phonon scattering. In polycrystals, scattering at grain boundaries dominates.

Transport properties of the ferromagnetic metals. II. Nickel

1976 ◽  
Vol 54 (1) ◽  
pp. 92-102 ◽  
Author(s):  
M. J. Laubitz ◽  
T. Matsumura ◽  
P. J. Kelly
Keyword(s):  
Transport Properties ◽  
Electron Scattering ◽  
Phonon Scattering ◽  
Positive Slope ◽  
Ferromagnetic Metals ◽  
Subsequent Publication ◽  
Consistent Group ◽  
Characteristic Features ◽  
Normal Electron ◽  
Electron Phonon Scattering

We present new experimental results for the transport properties of Ni. In comparing these results to previously published values, we show that there exists a consistent group of experimental data which establishes reliably the transport properties of pure Ni from perhaps 30 to 1500 K. In the paramagnetic range (T > 630 K), these properties show three characteristic features: a positive slope of the thermal conductivity (which is equivalent to an electrical resistivity increasing less than linearly with temperature), a large negative thermopower, and a Lorenz function substantially larger than the Sommerfeld value, L0. In attempting to provide an explanation of these features, we have discovered that the model of Mott, wherein the electronic relaxation time is inversely proportional to the density of states, does not appear to be universally valid and, more importantly, that the observed properties cannot be consistently explained if we assume pure electron–phonon scattering. To achieve consistency, at least one other scattering mechanism has to be included, such as normal electron–electron scattering; this will be taken up in detail in a subsequent publication.

Anisotropic Normal State Transport Properties of Oxide Superconductors Predicted from Lapw Band Structures

1987 ◽  
Vol 99 ◽  
Author(s):  
Philip B. Allen ◽  
Warren E. Pickett ◽  
Henry Krakauer
Keyword(s):  
Single Crystal ◽  
Transport Properties ◽  
Normal State ◽  
Phonon Scattering ◽  
Oxide Superconductors ◽  
Band Structures ◽  
Electron Phonon Scattering

ABSTRACTThe resistivity, Hall, and thermopower tensors are calculated for the normal state of oxide superconductors on the assumption of band quasiparticle behavior. The shape of the resistivity ραβin the metallic a-b plane is consistent with ordinary impurity and electron-phonon scattering, but the magnitude is larger than predicted. The Hall tensor is predicted to be hole-like for orbits in the a-b plane but electron-like for a-c or b-c orbits, while the thermopower is predicted to be electron-like in the a-b plane and hole-like along the c-axis. Single crystal experiments have confirmed some of these predictions for the Hall tensor.

Modification of superconducting and resistive properties of HoBa2Cu3O7−δ single crystals under application-removal of high hydrostatic pressure

2016 ◽  
Vol 30 (17) ◽  
pp. 1650188 ◽  
Author(s):  
R. V. Vovk ◽  
G. Ya. Khadzhai ◽  
O. V. Dobrovolskiy ◽  
S. N. Kamchatna ◽  
A. Chroneos
Keyword(s):  
High Pressure ◽  
Hydrostatic Pressure ◽  
Single Crystals ◽  
Basal Plane ◽  
High Hydrostatic Pressure ◽  
Electrical Resistance ◽  
Phonon Scattering ◽  
Phase Segregation ◽  
Temperature Dependences ◽  
Electron Phonon Scattering

The influence of a high hydrostatic pressure on the basal-plane electrical resistance along the twin boundaries in underdoped HoBa2Cu3O[Formula: see text] single crystals is investigated. An enhancement of the phase segregation caused by the high-pressure-induced redistribution of the labile oxygen has been revealed. The temperature dependences of the electrical resistance above [Formula: see text] can be approximated well within the framework of the model of [Formula: see text] electron–phonon scattering.

Magnetic and transport properties of single crystals of Fe-based superconductors of 122 family

2014 ◽  
Vol 184 (8) ◽  
pp. 897-902 ◽  
Author(s):  
Yurii F. Eltsev ◽  
K.S. Pervakov ◽  
V.A. Vlasenko ◽  
S.Yu. Gavrilkin ◽  
E.P. Khlybov ◽  
...  
Keyword(s):  
Transport Properties ◽  
Single Crystals
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