Topic
Variable-range hopping
About: Variable-range hopping is a research topic. Over the lifetime, 3606 publications have been published within this topic receiving 66561 citations.
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TL;DR: In this paper, the momentum-dependent spectral function and the Tomonaga-Luttinger parameter for the one-dimensional extended Hubbard model with alternating hopping integrals at quarter band filling were calculated.
Abstract: Using the (dynamical) density-matrix renormalization group method, we calculate the momentum-dependent spectral function and the Tomonaga–Luttinger parameter for the one-dimensional extended Hubbard model with alternating hopping integrals at quarter band filling.
01 Apr 2004
TL;DR: In this article, the electrical, structural and thermal properties of copper(II) 4-aminobenzoate and copper (II) 3,5-dinitrobenzoate are reported.
Abstract: The electrical, structural and thermal properties of copper(II) 4-aminobenzoate and copper(II) 3,5-dinitrobenzoate are reported. The direct current conductivities were analyzed at low (10 < T(K) < 300) and at high temperatures (300 < T(K) < 440). The Mott’s variable range hopping and Arrhenius laws were used as models for the conductivity profiles obtained. The results show that the electronic conduction characteristics of these materials depend on the structure and thermal stability. X-ray powder diffraction, infrared spectroscopy, thermogravimetric analysis and differential scanning calorimetry support the above findings.
TL;DR: In this paper, the conduction mechanism in Ga4Se3S single crystals has been investigated by means of dark and illuminated conductivity measurements for the first time, which revealed the dominance of the thermionic emission and the thermally assisted variable range hopping (VRH) of charged carriers above and below 170 K, respectively.
TL;DR: The proximity of resonant tunneling provides the significant preexponential temperature dependence in hopping conductivity, changes the Mott stretched exponent and leads to a very small activation energy and a weak localization at temperatures, much lower than Mott temperature as mentioned in this paper.
05 Nov 2020
TL;DR: In this paper, the structural and electrical properties of CaRuO3 perovskite have been studied using x-ray powder diffraction and Rietveld analysis, and the electrical resistivity data for thin film of CaO3/SrTiO3 shows increase in resistivity with decreasing the temperature.
Abstract: We have studied the structural and electrical transport properties of CaRuO3 perovskite. Structural investigation has been done using x-ray powder diffraction and Rietveld analysis. CaRuO3 crystallizes in orthorhombic crystal structure with Pbnm space group. Electrical resistivity data of CaRuO3 exhibits metallic behavior throughout the temperature range and it follows non-Fermi liquid (NFL) behavior at low temperature range. Epitaxial thin film of CaRuO3 has been prepared on SrTiO3 (100) substrate using the pulse laser deposition (PLO) technique. The electrical resistivity data for thin film of CaRuO3/SrTiO3 shows increase in resistivity with decreasing the temperature. Nature of charge conduction is found to follow thermally activated Mott’s variable range hopping.