Matches in SemOpenAlex for { <https://semopenalex.org/work/W2000481592> ?p ?o ?g. }
- W2000481592 endingPage "3627" @default.
- W2000481592 startingPage "3612" @default.
- W2000481592 abstract "We study the bulk-phonon-scattering contribution to the transport properties of a two-dimensional electron gas formed at the interface of an ultrapure ${mathrm{Al}}_{mathit{x}}$${mathrm{Ga}}_{1mathrm{ensuremath{-}}mathit{x}}$As/GaAs heterojunction. Assuming that the electrons only occupy the lowest subband, we calculate the mobility as a function of temperature for the temperature range T=1--300 K, within the variational-subband-wave-function model for carrier confinement. Our work encompasses three physically distinct temperature ranges with respect to phonon scattering: the Block-Gruneisen (BG), equipartition (EP), and inelastic regimes. In the EP regime we calculate (i) the individual and total scattering rates ${mathrm{ensuremath{tau}}}_{mathit{s}}^{mathrm{ensuremath{-}}1}$, and momentum relaxation rates ${mathrm{ensuremath{tau}}}_{mathit{t}}^{mathrm{ensuremath{-}}1}$, due to deformation-potential and piezoelectric coupled acoustic-mode phonons, with screening of these rates taken into account within the static random-phase approximation; (ii) the acoustic-phonon-scattering limited drift mobilities ${mathrm{ensuremath{mu}}}_{mathrm{ac}}$ for different densities ${mathit{n}}_{mathit{s}}$ as a function of temperature T; (iii) the level of validity of Matthiessen's rule; and (iv) the dimensionless Hall ratio ${mathit{r}}_{mathit{H}}$. In addition, we investigate in detail the temperature dependence of the low-temperature mobility and find excellent agreement with experimental data for the linear coefficient ensuremath{alpha}=d${mathrm{ensuremath{mu}}}^{mathrm{ensuremath{-}}1}$(T)/dT of the temperature dependence as a function of density.We carry out similar calculations in the BG regime and compare the results with the corresponding ones in the EP regime. Finally, to evaluate the mobility in the inelastic regime at high temperatures above Tensuremath{approxeq}40 K, where the scattering from polar LO phonons becomes important, we compute the first-order perturbation distribution ensuremath{varphi}(E) as a function of the carrier energy E by directly solving the linearized Boltzmann equation by an iterative method. We compare these results with the commonly used closed-form approximations for ensuremath{varphi}: the low-temperature relaxation-time approximation ${mathrm{ensuremath{tau}}}_{mathrm{LT}}$, and the high-energy relaxation-time approximation ${mathrm{ensuremath{tau}}}_{mathrm{HE}}$, and check their level of validity." @default.
- W2000481592 created "2016-06-24" @default.
- W2000481592 creator A5060980314 @default.
- W2000481592 creator A5081089782 @default.
- W2000481592 date "1992-02-15" @default.
- W2000481592 modified "2023-10-14" @default.
- W2000481592 title "Phonon-scattering-limited electron mobilities in<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>Al</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant=italic>x</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>Ga</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mi mathvariant…" @default.
- W2000481592 cites W178290643 @default.
- W2000481592 cites W1968962721 @default.
- W2000481592 cites W1971117556 @default.
- W2000481592 cites W1971693492 @default.
- W2000481592 cites W1972727378 @default.
- W2000481592 cites W1973915735 @default.
- W2000481592 cites W1974502117 @default.
- W2000481592 cites W1978187707 @default.
- W2000481592 cites W1978499776 @default.
- W2000481592 cites W1986249791 @default.
- W2000481592 cites W1990312825 @default.
- W2000481592 cites W1996400606 @default.
- W2000481592 cites W1999801657 @default.
- W2000481592 cites W2000296496 @default.
- W2000481592 cites W2007025971 @default.
- W2000481592 cites W2007041954 @default.
- W2000481592 cites W2009455759 @default.
- W2000481592 cites W2010868059 @default.
- W2000481592 cites W2011490371 @default.
- W2000481592 cites W2012675877 @default.
- W2000481592 cites W2014177118 @default.
- W2000481592 cites W2015578654 @default.
- W2000481592 cites W2015590046 @default.
- W2000481592 cites W2026268432 @default.
- W2000481592 cites W2028531368 @default.
- W2000481592 cites W2029569057 @default.
- W2000481592 cites W2031344497 @default.
- W2000481592 cites W2031741035 @default.
- W2000481592 cites W2031812079 @default.
- W2000481592 cites W2034028667 @default.
- W2000481592 cites W2035733312 @default.
- W2000481592 cites W2039644217 @default.
- W2000481592 cites W2043365391 @default.
- W2000481592 cites W2043461117 @default.
- W2000481592 cites W2044494583 @default.
- W2000481592 cites W2045074625 @default.
- W2000481592 cites W2046128500 @default.
- W2000481592 cites W2049579729 @default.
- W2000481592 cites W2052027089 @default.
- W2000481592 cites W2055610538 @default.
- W2000481592 cites W2060037666 @default.
- W2000481592 cites W2061195277 @default.
- W2000481592 cites W2061387735 @default.
- W2000481592 cites W2062736690 @default.
- W2000481592 cites W2074254299 @default.
- W2000481592 cites W2077688706 @default.
- W2000481592 cites W2081426085 @default.
- W2000481592 cites W2090355000 @default.
- W2000481592 cites W2094978447 @default.
- W2000481592 cites W2108151352 @default.
- W2000481592 cites W2118246323 @default.
- W2000481592 cites W2129445623 @default.
- W2000481592 cites W2161969185 @default.
- W2000481592 cites W2163661276 @default.
- W2000481592 cites W2168608051 @default.
- W2000481592 doi "https://doi.org/10.1103/physrevb.45.3612" @default.
- W2000481592 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/10001942" @default.
- W2000481592 hasPublicationYear "1992" @default.
- W2000481592 type Work @default.
- W2000481592 sameAs 2000481592 @default.
- W2000481592 citedByCount "161" @default.
- W2000481592 countsByYear W20004815922012 @default.
- W2000481592 countsByYear W20004815922013 @default.
- W2000481592 countsByYear W20004815922014 @default.
- W2000481592 countsByYear W20004815922015 @default.
- W2000481592 countsByYear W20004815922016 @default.
- W2000481592 countsByYear W20004815922017 @default.
- W2000481592 countsByYear W20004815922018 @default.
- W2000481592 countsByYear W20004815922019 @default.
- W2000481592 countsByYear W20004815922020 @default.
- W2000481592 countsByYear W20004815922021 @default.
- W2000481592 countsByYear W20004815922022 @default.
- W2000481592 countsByYear W20004815922023 @default.
- W2000481592 crossrefType "journal-article" @default.
- W2000481592 hasAuthorship W2000481592A5060980314 @default.
- W2000481592 hasAuthorship W2000481592A5081089782 @default.
- W2000481592 hasConcept C121332964 @default.
- W2000481592 hasConcept C191486275 @default.
- W2000481592 hasConcept C24169881 @default.
- W2000481592 hasConcept C24872484 @default.
- W2000481592 hasConcept C26873012 @default.
- W2000481592 hasConcept C62520636 @default.
- W2000481592 hasConceptScore W2000481592C121332964 @default.
- W2000481592 hasConceptScore W2000481592C191486275 @default.
- W2000481592 hasConceptScore W2000481592C24169881 @default.
- W2000481592 hasConceptScore W2000481592C24872484 @default.
- W2000481592 hasConceptScore W2000481592C26873012 @default.
- W2000481592 hasConceptScore W2000481592C62520636 @default.
- W2000481592 hasIssue "7" @default.
- W2000481592 hasLocation W20004815921 @default.
- W2000481592 hasLocation W20004815922 @default.