Results 201 to 210 of about 112,352 (224)

The effect of the band edges on the Seebeck coefficient [PDF]

open access: possibleJournal 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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The seebeck coefficient of YbAl2 and YbAl3

Physics Letters A, 1974
Abstract The absolute Seebeck coefficient of YbAl2, YbAl3, LuAl2 and LuAl3 has been measured at temperatures between 4 and 300 K. The results of the Yb compounds are in conformity with the proposed virtual bound state character of the Yb ground state.
K.H.J. Buschow   +2 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.
Gerald D. Mahan, Gerald D. Mahan
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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, Sebastian Haupt, Ernst Lenz
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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.
Gerald D. Mahan, Jianwei Cai
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The Seebeck coefficients and the Fermi energies of arsenic

Solid State Communications, 1970
Abstract The Seebeck coefficient tensor components of arsenic are presented. S11 is positive: holes dominate xy plane transport; S33 is negative: electrons are the more mobile in the z-direction. A quantitative analysis, based on a two-band, multivalley Fermi surface model, is carried through. The partial Fermi energies obtained are Eef = 0.32 eV and
G.A. Saunders, A.P. Jeavons
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Anomalous Seebeck Coefficient in Boron Carbides

MRS Proceedings, 1987
ABSTRACTBoron carbides exhibit an anomalously large Seebeck coefficient with a temperature coefficient that is characteristic of polaronic hopping between inequivalent sites. The inequivalence in the sites is associated with disorder in the solid. The temperature dependence of the Seebeck coefficient for materials prepared by different techniques ...
T. L. Aselage   +4 more
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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 ...
Michael Galperin, Jonas Fransson
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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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