Phonon drag effect
WebMay 10, 2016 · Coulomb drag, a term coined in analogy to phonon drag, refers to the effect of mutual friction between nonequilibrium conduction electrons belonging to two electrically isolated but closely spaced conductors. Coulomb drag experiments provide unique insight into microscopic properties of interacting many-body systems and are important in … WebSep 6, 2016 · Phonon transport is an essential property of thermoelectric materials. Although the phonon carries heat, which reduces the thermoelectric efficiency, it contributes positively to the Seebeck coefficient S through the phonon-drag effect, as typified by the high-purity semiconductors, which show fairly large S at cryogenic temperatures.
Phonon drag effect
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WebApr 1, 1996 · The phonon-drag voltage induced by acoustic phonons has been studied for the first time in 2D hole gas (2DHG) systems, formed in GaAs/AlGaAs heterostructures. … WebMar 31, 2016 · The theory of phonon-drag thermopower resulting from a temperature gradient in the plane of a two-dimensional electron gas layer in a parabolic quantum well is developed. The interaction mechanisms between electrons and acoustic phonons are considered, taking into account potential screening of the interaction. It is found that the …
WebDec 29, 2014 · However, the Seebeck effect can also have a phonon drag component, due to momentum exchange between charge carriers and lattice phonons, which is more difficult to quantify. In this work, we present the first study of phonon drag in the AlGaN/GaN two-dimensional electron gas (2DEG). We find that phonon drag does not contribute …
Webcarrier phonon drag effect. In contrast to the relaxation time of LW 3-phonon processes which is w ell described by the Herring s theory, the exact theoretical description of 4-phonon processe s is a very difficult and maybe a hopeless task, if quantitatively correct results are nee ded. Therefore we decided to evaluate WebHere, we focus on the phonon drag effect. Historically, a large Seebeck coefficient was observed in doped semiconductors such as Ge and Si, 6 – 8) which has been ascribed to …
WebPhonon drag is an increase in the effective mass of conduction electrons or valence holes due to interactions with the crystal lattice in which the electron moves. As an electron moves past atoms in the lattice its charge distorts or polarizes the nearby lattice.
WebPhonon drag does not affect the electrical resistivity. σ is only affected by the rate that the electrons and phonons scatter from each other. That rate is not affected by phonon drag … how do you spell shyedhttp://export.arxiv.org/abs/2304.00165 how do you spell shushWebJan 31, 2002 · It has been predicted that the phonon drag thermopower will be enhanced in very low mobility samples. The effect occurs when ql No full-text available Citations (19) ... At relatively low... how do you spell shriekWebSep 8, 2014 · The contribution of the phonon drag effect to the Seebeck coefficient of P-doped ultrathin Si-on-insulator (SOI) layers with a thickness of 9–100 nm is investigated for near-room-temperature... how do you spell shuffleWebApr 13, 2024 · The effect of phonon focusing on the drag thermopower and lattice thermal conductivity of bulk potassium crystals and nanostructures based on it was analyzed, and the spectrum and polarization vectors of phonons were determined in [1–4].In these studies, when analyzing the thermopower and lattice thermal conductivity, it was assumed that … how do you spell shurWebMar 31, 2024 · We study theoretically the effect of acoustic-phonon confinement on the phonon-drag thermopower Sg of a two-dimensional (2D) electron gas in a quantum well … phoneeasy 5516WebPhonon drag does not affect the electrical resistivity. σ is only affected by the rate that the electrons and phonons scatter from each other. That rate is not affected by phonon drag and there is no peak in the conductivity or resistivity. The thermopower is the only measurement that shows the peak from phonon drag. how do you spell shutter