Počet záznamů: 1
Phonon affected transport through molecular quantum
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SYSNO ASEP 0332243 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Phonon affected transport through molecular quantum Překlad názvu Vliv fononů na transport molekulární "kvantovou tečkou" Tvůrce(i) Loos, Jan (FZU-D) RID
Koch, T. (DE)
Alvermann, A. (DE)
Bishop, A. R. (US)
Fehske, H. (DE)Zdroj.dok. Journal of Physics-Condensed Matter. - : Institute of Physics Publishing - ISSN 0953-8984
Roč. 21, č. 39 (2009), 395601/1-395601/18Poč.str. 18 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova quantum dots ; electron - phonon interaction ; polarons Vědní obor RIV BM - Fyzika pevných látek a magnetismus CEZ AV0Z10100521 - FZU-D (2005-2011) UT WOS 000269626500011 DOI 10.1088/0953-8984/21/39/395601 Anotace To describe the interaction of molecular vibrations with electrons at a quantum dot contacted to metallic leads, we extend an analytical approach we previously developed for the many-polaron problem. Our scheme is based on an incomplete variational Lang-Firsov transformation, combined with a perturbative calculation of the electron-phonon self-energy in the framework of generalized Matsubara functions. This allows us to describe the system at weak-to-strong coupling and intermediate-to-large phonon frequencies. We present results for the quantum dot spectral function and for the kinetic coefficient that characterizes the electron transport through the dot. We critically examine the strengths and limitations of our approach, and discuss the properties of the molecular quantum dot in the context of polaron physics. We place particular emphasis on the importance of corrections to the concept of an anti-adiabatic dot polaron suggested by the complete Lang-Firsov transformation. Pracoviště Fyzikální ústav Kontakt Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Rok sběru 2010
Počet záznamů: 1