Results 201 to 210 of about 27,867 (246)

Seebeck Coefficient (Thermopower)

2007
Based on the idea that different temperatures generate different carrier densities and the resulting carrier diffusion causes the thermal electromotive force (emf), a new formula for the Seebeck coefficient (thermopower) S is obtained: \(S = (2\ln{2} /3)(qn)^{-1}\epsilon_{F}k_{B}({\cal N}_{0}/V)\), where q, n, \(\epsilon_{F}\), \({\cal N}_{0}\), and V ...
Shigeji Fujita, Kei Ito
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Effective Seebeck coefficient for semiconductors

Physical Review B, 2006
A distinction between two common definitions of Seebeck coefficient is clarified. The effective Seebeck coefficient, which describes the effective electric field induced by a temperature gradient, is found to be a constant for a homogeneous doped semiconductor regardless of its doping.
Jianwei Cai, G. D. Mahan
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Experimental setup for the Seebeck and Nernst coefficient measurements

Review of Scientific Instruments, 2020
A new experimental setup is designed for the measurement of Seebeck and Nernst coefficients on the single crystal flakes and polycrystalline samples. The setup utilizes the multifunctional probe assembly of the physical property measurement system by Quantum Design, Inc. and can measure in the temperature range of 1.8 K–380 K up to 8 T magnetic fields.
Shailja Sharma, C. S. Yadav
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Reference Material for Seebeck Coefficients

International Journal of Thermophysics, 2014
This paper describes a measurement method and a measuring system to determine absolute Seebeck coefficients of thermoelectric bulk materials with the aim of establishing reference materials for Seebeck coefficients. Reference materials with known thermoelectric properties are essential to allow a reliable benchmarking of different thermoelectric ...
F. Edler, E. Lenz, S. Haupt
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The effect of the band edges on the Seebeck coefficient

Journal of Physics: Condensed Matter, 2010
The classical thermopower formulae generally applied for the calculation of the Seebeck coefficient S are argued to be incomplete. S can be separated into two different contributions, a scattering term, S(0), and a thermodynamic term, ΔS, representing the additional change of the electrochemical potential μ with temperature T caused by 'non-scattering'
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Spin seebeck coefficient of a molecular spin pump

Physical Chemistry Chemical Physics, 2011
Within a generalized version of previously considered model of a molecular spin pump controlled by an external electric field [J. Fransson and M. Galperin, Phys. Rev. B, 2010, 81, 075311] we discuss thermal properties of such spintronic devices. The spin Seebeck coefficient of a molecular spin pump is introduced, and several possible definitions of a ...
Jonas, Fransson, Michael, Galperin
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The Seebeck coefficient of superionic conductors

Journal of Applied Physics, 2015
We present a theory of the anomalous Seebeck coefficient found in the superionic conductor Cu2Se. It has a phase transition at T = 400 K where the cations disorder but the anions do not. This disorder gives a temperature-dependent width to the electronic states in the conduction band. This width provides the anomalous Seebeck contribution.
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Seebeck coefficients in vanadium spinels

Materials Research Bulletin, 1970
Abstract Omission of a negligibly small transport term gives a temperature-independent Seebeck coefficient for polaron charge carriers θ ± = ± 198 log [(N-p)/p], where the polaron concentration p can be determined from chemistry and the concentration N of available polaron sites is model-dependent. The expression contains no adjustable parameters.
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Seebeck coefficient of graded porous composites

Journal of Materials Research, 2013
Abstract
Roland H. Tarkhanyan, Dimitris G. Niarchos   +1 more
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Seebeck coefficient for the Anderson model

Physical Review B, 1997
The single-site Anderson model with degeneracy ${N}_{f}$ is solved for the case in which the lowest eigenstate contains $L$ electrons in the $f$ orbital, where $0lLl{N}_{f}.$ The noncrossing approximation is used to find the density of states including the Kondo resonance.
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