dc.contributor.author | Gokden, S | |
dc.contributor.author | Shealy, RJ | |
dc.contributor.author | Arikan, MC | |
dc.contributor.author | Tilak, V | |
dc.contributor.author | Schaff, B | |
dc.contributor.author | Balkan, N | |
dc.date.accessioned | 2021-03-06T20:09:37Z | |
dc.date.available | 2021-03-06T20:09:37Z | |
dc.date.issued | 2002 | |
dc.identifier.citation | Balkan N., Arikan M., Gokden S., Tilak V., Schaff B., Shealy R., "Energy and momentum relaxation of hot electrons in GaN/AlGaN", JOURNAL OF PHYSICS-CONDENSED MATTER, cilt.14, ss.3457-3468, 2002 | |
dc.identifier.issn | 0953-8984 | |
dc.identifier.other | av_f9071f41-6319-4e37-95fe-16a3d81df9bc | |
dc.identifier.other | vv_1032021 | |
dc.identifier.uri | http://hdl.handle.net/20.500.12627/163112 | |
dc.identifier.uri | https://doi.org/10.1088/0953-8984/14/13/305 | |
dc.description.abstract | We report the experimental studies of hot-electron energy and momentum relaxation in the steady state in GaN/AlGaN HEMT structures with a high two-dimensional electron density of n = 1.5 x 10(13) cm(-2). From the LO-phonon-scattering-limited component of the mobility we obtain for the LO phonon the energy of homega similar to 90 meV and the momentum relaxation time of tau(m) similar to 4 fs. Drift velocity versus electric field characteristics obtained from the pulsed I-V measurements show that, at T-L = 77 K, the drift velocity saturates at upsilon(d) = 1.0 X 10(7) cm s(-1) at electric fields in excess of E similar to 7.5 kV cm(-1), and at T-L = 300 K it saturates at upsilon(d) similar to 5 x 10(6) cm s(-1), at an electric field of around E similar to 10 kV cm(-1). Electron temperature as a function of applied electric field is obtained by comparing the measured electric field dependence of the mobility mu(E) at a fixed lattice temperature, with the lattice temperature dependence of the mobility at a fixed low electric field. The electron energy loss rate is then determined from the electron temperature dependence of the power loss using the power balance equations. The effect of hot-phonon production on the observed momentum and energy relaxation of hot electrons is discussed within the framework of a theoretical model, which was originally developed for III-V material systems and has been adapted for a two-dimensional electron gas in GaN, and in which phonon drift is neglected. | |
dc.language.iso | eng | |
dc.subject | Temel Bilimler (SCI) | |
dc.subject | Temel Bilimler | |
dc.subject | FİZİK, YOĞUN MADDE | |
dc.subject | Fizik | |
dc.subject | Yoğun Madde 1:Yapısal, Mekanik ve Termal Özellikler | |
dc.title | Energy and momentum relaxation of hot electrons in GaN/AlGaN | |
dc.type | Makale | |
dc.relation.journal | JOURNAL OF PHYSICS-CONDENSED MATTER | |
dc.contributor.department | , , | |
dc.identifier.volume | 14 | |
dc.identifier.issue | 13 | |
dc.identifier.startpage | 3457 | |
dc.identifier.endpage | 3468 | |
dc.contributor.firstauthorID | 164978 | |