Results 151 to 160 of about 87,344 (168)
JETP Letters, 2015 © 2014, Pleiades Publishing, Inc. For a two-dimensional optimally doped antiferromagnet with spin S =1/2, we study the temperature dependence of the electrical resistivity ρ(T), Hall coefficient RH(T), and thermopower Q(T). The temperature dependence corresponding to optimally doped layered high-Tc superconducting cuprates has been obtained ...
I. A. Larionov +2 more
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Journal of Physics: Condensed Matter, 1993 Reports on detailed measurements of the thermoelectric power coefficient, L(T) identical to S(T) sigma (T), relating the thermoelectric power S(T) to the electrical conductivity sigma (T) in three polycrystalline Y1Ba2Cu3O7- delta samples. All the samples have almost the same composition ( delta
Oscar Cabeza +6 more
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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 ...
Kei Ito, Shigeji Fujita
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Drift-diffusion contributions to the thermopower and Nernst–Ettingshausen coefficient of graphite
Philosophical Magazine B, 1980 Abstract Drift-diffusion contributions to the thermoelectric power and Nernst–Ettingshausen effect have been calculated for graphite, using simplified models for the dispersion relationship ∊(k) and carrier relaxation time τ(∊). A comparison of the results with those derived from experiment on single-crystal and highly oriented pyrolytic graphite ...
Ian L. Spain, Claude Ayache
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Journal of Applied Physics, 1992 Ceramic nickel-copper-manganite based negative temperature coefficient thermistors are unstable under thermal constraint, which increases the resistivity of these devices. This unstability can be reduced by the addition of a small amount of barium. These ceramics have a spinel structure, and the conduction takes place by a hopping process involving ...
A. Loubiere +4 more
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Physical Review B, 2008 Motivated by the newly synthesized mixed-valent spinel ${\text{LiRh}}_{2}{\text{O}}_{4}$ for which a large thermopower is observed in the metallic cubic phase above 230 K [Y. Okamoto et al., Phys. Rev. Lett. 101, 086404 (2008)], we calculate the Seebeck coefficient by the combination of local density approximation and dynamical mean-field theory ...
Karsten Held +5 more
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Resistivity, hall coefficient and thermopower in Mg70Cu30-x,Znx (0 ⩽ x ⩽ 30) metallic glasses
Journal of Non-Crystalline Solids, 1987 Electrical resistivity. Hall coefficient and thermopower have been measured on Mg70Cu30-xZnx (0 ⩽ x ⩽ 30) ternary metallic glasses in the temperature range 77–800 K. We revealed that the resistivity and the Hall coefficient at 300 K exhibit a common feature in their composition dependences, but the thermopower behaves entirely in a different manner. By
Uichiro Mizutani, Takeshi Matsuda
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Journal of Physics: Condensed Matter, 2011 In a previous paper (Sonntag 2010 J. Phys.: Condens. Matter 22 235501) the classical thermopower formula has been argued to be incomplete, because it only takes into account the scattering properties of the carriers, but not the temperature dependence of the electrochemical potential μ caused by variation of the carrier density and/or band edge shift ...
Sonntag, J. +4 more
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