Showing papers on "Variable-range hopping published in 1975"
01 Jan 1975
152 citations
TL;DR: In this paper, the effect of Coulomb interaction on variable-range hopping is discussed, and a recent paper about the Coulomb effect on variable range hopping is also discussed, but without Coulomb interactions.
Abstract: A recent letter about the effect of Coulomb interaction on variable-range hopping is discussed.
147 citations
TL;DR: In this paper, the authors discussed the hopping conduction in Ln1 and xSrxCoO3 in terms of disorder and in the light of Mossbauer measurements.
Abstract: Hopping conduction in Ln1 – xSrxCoO3 is discussed in terms of localization due to disorder and in the light of Mossbauer measurements. The hopping times deduced from conductivity and Mossbauer effect differ widely, and an explanation is suggested.
32 citations
29 citations
TL;DR: In this article, a qualitative discussion of the essentials of small-polaron motion is presented, and a semiclassical approach to the calculation of the high-temperature (κT ≳ħωDebye) adiabatic and nonadiabatic jump rate is described with the question of correlated hopping motion also being addressed.
27 citations
TL;DR: For electron densities less than 7 × 1011 cm−2, the channel conductivity is activated with a T-independent activation energy for T ⪸ 1.3 K as discussed by the authors.
24 citations
23 citations
TL;DR: In this article, the conductivity of n channel MOSFET devices has been measured in the temperature range 4.2K
Abstract: The conductivity of n channel MOSFET devices has been measured in the temperature range 4.2K
19 citations
TL;DR: The question of local field corrections to the hopping conductivity of small polarons in a polarizable dielectric was investigated in this paper, where it was shown that the Lorentz contribution to the dipolar potentials cancels in taking the inter-site energy difference, and that the electric field appearing in the hoppingconductivity is just the macroscopic field.
Abstract: The question of local field corrections to the hopping conductivity of small polarons in a polarizable dielectric is investigated. It is shown that the Lorentz contribution to the dipolar potentials cancel in taking the inter-site energy difference, and that the electric field appearing in the hopping conductivity is just the macroscopic field.
6 citations
TL;DR: In this paper, the d.c. hopping conductivity of magnetically frozen electrons is calculated using a critical exponent approximation, where the density of states is constant near the Fermi level and the sigma is proportional to exp(T 0/T 0.4) where T 0 depends on the magnetic field.
Abstract: The d.c. hopping conductivity, sigma , of magnetically frozen electrons is calculated using a critical exponent approximation. When the density of states is constant near the Fermi level sigma is proportional to exp(-T0/T)0.4) where T0 depends on the magnetic field.
6 citations
TL;DR: In this paper, the dependence of the conductance characteristic on the spatial distribution of the impurities is investigated. And the contradiction between some earlier theories of zero-bias anomalies is resolved.
Abstract: A hopping model of tunnelling proposed by Caroli et al. (see ibid., vol.4, p.916 (1971) and ibid., vol.4, p.2598 (1971)) is used to study electron-impurity scattering in metal-insulator-metal junctions with magnetic impurity in either the insulator or the electrodes. The contradiction between some earlier theories of zero-bias anomalies is resolved. These theories appear as limiting cases of the hopping model theory of tunnelling. Special attention is devoted to the study of the dependence of the conductance characteristic on the spatial distribution of the impurities.