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Author: M. Pollak Publisher: ISBN: Category : Languages : en Pages : 21
Book Description
Miller and Abrahams' random impedance network is generalized to include non-steady state behavior. The generalized network has the property that for dc it is equivalent to the MA network, and for high frequencies it corresponds to the theory of Pollak and Geballe. In addition to Miller and Abrahams' resistances Zij between states i and j the generalized network includes capacitances Ci connected between the i terminal of Zij and one terminal of a generator Vi. The other terminal of Vi is connected to a 'ground' common to all the generators. The capacitances are related to the equilibrium occupation probability of site i, and the generators are related in a simple way to the imposed field. The network can also be extended to include electronic correlation effects by the inclusion of feedback elements.
Author: M. Pollak Publisher: ISBN: Category : Languages : en Pages : 21
Book Description
Miller and Abrahams' random impedance network is generalized to include non-steady state behavior. The generalized network has the property that for dc it is equivalent to the MA network, and for high frequencies it corresponds to the theory of Pollak and Geballe. In addition to Miller and Abrahams' resistances Zij between states i and j the generalized network includes capacitances Ci connected between the i terminal of Zij and one terminal of a generator Vi. The other terminal of Vi is connected to a 'ground' common to all the generators. The capacitances are related to the equilibrium occupation probability of site i, and the generators are related in a simple way to the imposed field. The network can also be extended to include electronic correlation effects by the inclusion of feedback elements.
Author: Publisher: Elsevier ISBN: 0444599894 Category : Science Languages : en Pages : 487
Book Description
Dynamical Properties of Solids, Volume 4: Disordered Solids, Optical Properties focuses on the lattice dynamical properties of noncrystalline and disordered solids and optical properties of crystalline solids. The selection first elaborates on the vibrational properties of amorphous solids and computer experiments and disordered solids. Topics include thermal and electrical transport, density of states, numerical methods, localization, low frequency modes, and theoretical background. The text then takes a look at the morphic effects in lattice dynamics, including normal coordinate formalism, electric-field-induced infrared absorption and Raman scattering, stress-induced changes in the phonon frequencies, and the effect of time reversal on the symmetry of the long-wavelength optical. The manuscript examines the absorption of infrared radiation by multiphonon processes in solids, as well as theoretical studies of infrared absorption in the multiphonon region and experimental studies of infrared absorption at frequencies above the characteristic lattice vibration frequencies. The selection is a dependable source of data for researchers interested in the optical properties of crystalline solids and lattice dynamical properties of noncrystalline and disordered solids.
Author: C J Adkins Publisher: World Scientific ISBN: 9814552267 Category : Languages : en Pages : 374
Book Description
The phenomenon of hopping, in which a particle executes a series of jumps between discrete states, has a fundamental role in a wide range of solid state transport phenomena. In these proceedings acknowledged experts in the field describe important recent progress in developing the phenomenology of hopping processes and applying it to different systems, including crystalline and amorphous semiconductors, glasses, polymers, mesoscopic conductors and high temperature superconductors.
Author: M. Pollak
Author: M. Pollak
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Author: M. Th Van Genuchten
Author: George K. Horton
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Author: C J Adkins
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