Results 81 to 90 of about 87,344 (168)

Temporal evolution of Seebeck coefficient in an ac driven strongly correlated quantum dot [PDF]

, 2013
We study the response of the thermopower of a quantum dot in the Kondo regime to sinusoidal displacement of the dot energy level via a gate voltage using time dependent non-crossing approximation and linear response Onsager relations. Instantaneous thermopower begins to exhibit complex fluctuations when the driving amplitude is increased at constant ...
arxiv   +1 more source

Effect of the Order-Disorder Transition on the Seebeck Coefficient of Nanostructured Thermoelectric Cu₂ZnSnS₄

Nanomaterials, 2019
Bulk samples of kesterite (Cu2ZnSnS4, CZTS) were produced by cold-pressing and sintering of CZTS powders obtained via reactive ball-milling. An increase in the Seebeck coefficient of more than 100 μV/K, almost doubling the expected value, is noticed
Eleonora Isotta, Carlo Fanciulli, Nicola M. Pugno, Paolo Scardi   +3 more
doaj   +1 more source

Theory of magnetothermoelectric phenomena in high-mobility two-dimensional electron systems under microwave irradiation [PDF]

arXiv, 2015
The response of two-dimensional electron gas to temperature gradient in perpendicular magnetic field under steady-state microwave irradiation is studied theoretically. The electric currents induced by temperature gradient and the thermopower coefficients are calculated taking into account both diffusive and phonon-drag mechanisms.
arxiv  

Effect of spontaneous polarization field on diffusion thermopower in AlGaN/GaN heterostructures

Chemical Physics Impact, 2023
Polarization field on diffusion thermopower Sd, of a two-dimensional electron gas (2DEG) formed at a wurtzite AlGaN/GaN heterojunction is investigated. The investigations of macroscopic polarization effect on diffusion thermopower over the wide range of ...
Bommalingaiah B．, Narayan Gaonkar, R.G. Vaidya   +2 more
doaj  

Thermopower evolution in Yb(Rh$_{1-x}$Co$_x$)$_2$Si$_2$ [PDF]

arXiv, 2018
We present thermopower measurements on Yb(Rh$_{1-x}$Co$_x$)$_2$Si$_2$. Upon Co substitution the Kondo temperature is decreasing and the single large thermopower minimum observed for YbRh$_2$Si$_2$ splits into two minima. Simultaneously, the absolute thermopower values are strongly reduced due to a weaker exchange coupling between the $4f$ and the ...
arxiv  

The influence of heavy doping of TiCoSb intermetallic semiconductor with Cr atoms on structural, kinetic and energetic properties

Фізика і хімія твердого тіла
The structural, electrokinetic, and energetic properties of the TiСо1-xCrxSb semiconductor obtained by doping TiCoSb with Cr atoms introduced into the structure by substituting Co atoms in the crystallographic position 4c were studied.
Yu. Stadnyk, L. Romaka, V.A. Romaka, A. Horyn, V.V. Romaka, T. Lukovskyy, O. Poplavskyi   +6 more
doaj   +1 more source

Large morphological sensitivity of the magneto-thermopower in Co/Cu multilayered systems

New Journal of Physics, 2015
We present results of first-principles calculations on the transport properties, both under an electric field or a temperature gradient, in Co/Cu multilayered systems. The various effects brought about by the changes in the morphological parameters, such
Voicu Popescu, Peter Kratzer
doaj   +1 more source

Magnetic Contribution to the Seebeck Effect

Entropy, 2018
The Seebeck effect is derived within the thermodynamics of irreversible processes when the generalized forces contain the magnetic term M ∇ B . This term appears in the formalism when the magnetic field is treated as a state variable.
Jean-Philippe Ansermet, Sylvain D. Brechet   +1 more
doaj   +1 more source

Two lifetimes in the thermopower of the cuprate metals [PDF]

arXiv, 1997
We study the temperature-dependence of thermoelectric transport in proton-irradiated thin films of the high Tc cuprate Tl2212. All the anomalous transport conductivities are affected by the irradiation but maintain their non-Fermi liquid forms. We note however that the anomalous temperature dependence of the thermopower scales precisely with the ...
arxiv  

Thermopower of Graphene Nanoribbons in the Pseudodiffusive Regime [PDF]

arXiv, 2018
Thermoelectric measurements for graphene ribbons are currently performed on samples that include atomic disorder via defects and irregular edges. In this work, we investigate the thermopower or Seebeck coefficient of graphene ribbons within the linear response theory and the Landauer formalism, and we consider the diffusive regime taken as a limit of ...
arxiv