Hopping conductivity in granular metals
Web6 jan. 2014 · Sheng P, Abeles B, Arie Y: Hopping conductivity in granular metals. Phys Rev Lett 1973, 31: 44–47. 10.1103/PhysRevLett.31.44. Article Google Scholar Mitani S, Takahashi S, Takanashi K, Yakushiji K, Maekawa S, Fujimori H: Enhanced magnetoresistance in insulating granular systems: evidence for higher-order tunneling. WebThey also observed that the conduction between polymer chains is the limiting factor in conduction and not the conductivity within a single chain. For polymers with conductivity more than 50 S/cm variable range hopping (VRH) behaviour was observed, and for those with less than 5 S/cm nearest distance hopping (NDH) and VRH behaviour was …
Hopping conductivity in granular metals
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WebWe modify some previous transport theories which consider only the nearest-neighbor hopping in granular metals, and compare the modified theory with the experiment of Abeles et al. In particular, we carry out a critical path analysis, and show that, with practical material parameters, the modified theory gives a value of T0(x) in better agreement with … WebIn theoretical and experimental studies of conductivity associated with intergranular tunneling of electrons in nanocomposites (granular metals), only the range of relatively low temperatures was traditionally investigated, in which only electron transitions involving singly-charged metal granules are significant.
Webconductivity, using the critical path method, in this case yielded a temperature dependence close to a simple activation (i.e. n-I). In this paper we report calculations of the … WebWe present evidence that in granular metals the observed temperature dependence of the low-field conductivity, exp(-bT α ) with α=12, can be ascribed to a relationship sE c …
Web22 sep. 2005 · We investigate effects of Coulomb interaction and hopping transport in the insulator phase of granular metals and quantum dot arrays considering both spatially … WebDevice physics and material science meet at the atomic scale of novel nanostructured semiconductors, and the distinction between new device or new material is blurred. Not only the quantum–mechanical effects in the electronic states of the device but also the granular atomistic representation of the underlying material are important.
Web21 aug. 2014 · About. Ph.D. in Chemical Physics with focus on Materials Science. A total of more than 17 years (5 years industrial, 9 years academic and 3 years government lab) of Quantum science, Semiconductor ...
Web1 sep. 2024 · I. Granular metallic systems. 1. Effect of the Coulomb blockade in a single grain. 2. Regular periodic systems: Metallic and insulating phases at low temperature. Metal to insulator transition. 3. Granular arrays with electrostatic disorder. Hopping conductivity. Hopping transport in granular metals. II. Hopping conductivity in granular ... texas south collegeWeb26 jul. 2024 · This leads to the conductivity of the material being dominated by the inter-grain processes, i.e. thermally-assisted tunneling of electrons between the grains. Due to the small grain size of... texas south centralWeb12 apr. 2024 · Terahertz time-domain spectroscopy has been used to study the THz optical properties of polyvinyl alcohol–graphene oxide–silver (PVA–GO–Ag) composite films with varying weight fractions of silver nanoparticles in the range of 0.0–0.64%. The measured THz AC conductivities are analyzed using the formalisms based on universal dielectric … texas south end zoneWebIn theoretical and experimental studies of conductivity associated with intergranular tunneling of electrons in nanocomposites (granular metals), only the range of relatively … texas south end zone projectWebTheoretical description of granular metals is still fragmentary [3±5]. Below the percolation threshold the electric conduction is caused by tunneling of electrons between grains, which re-quires an activation energy for charging the grains [3]. Thus, below the percolation threshold granular metals have an activated hopping conductivity. texas south concreteWebto the treatment with hopping conductivity in granular metals.32 The switch-on voltage is the voltage that makes the difference of electrostatic potentials between nearest-neighbor nanoparticles Ec equal to the energy gap between these two nanoparticles. As the bias increases further, the system is still in the charged state. When the applied bias texas south energyWebing a model of hopping conductivity between local-ized states. There are, however, disordered materials such as granular metals, ' and some disordered semiconductors, … texas south dakota