Kinetics of nonequilibrium electron-phonon system for semiconductors and metals in a strong electric field

• Datum: 2013
• Hauptverfasser: Karas, V.I., Potapenko, I.F., Vlasenko, A.M.
• Format: Artikel
• Sprache: English
• Veröffentlicht: Національний науковий центр «Харківський фізико-технічний інститут» НАН України 2013
• Schriftenreihe: Вопросы атомной науки и техники
• Schlagworte: Нелинейные процессы в плазменных средах
• Online Zugang: https://nasplib.isofts.kiev.ua/handle/123456789/112158
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Zitieren: Kinetics of nonequilibrium electron-phonon system for semiconductors and metals in a strong electric field / V.I. Karas΄, I.F. Potapenko, A.M. Vlasenko // Вопросы атомной науки и техники. — 2013. — № 4. — С. 272-278. — Бібліогр.: 7 назв. — англ.

Formation of non-stationary nonequilibrium distribution functions (DF) of electrons and phonons is investigated under the action of a strong pulse electric field on metal. For concreteness parameters were taken for nickel having reference temperature of 20 K. It is shown: isotropization of electron DF occurs as a result of impacts with lattice imperfections; •electron DF does not become thermodynamically equilibrium as electron-electron impacts in the given situation give essentially smaller contribution than electron-phonon collisions and collisions with a "another's" subsystem do not result to thermalization; •DF of electrons and phonons have high energy "tails" as in electronphonon impacts the momentum is transferred with sufficiently small transfer of energy; a lot of phonons with Debye energy are being born, i.e. phonon DF is being enriched by Debye phonons.