Dynamical screening effects in a coupled quasi-one-dimensional electron-phonon system

Autor:	N C Constantinou, C.R. Bennett, Bilal Tanatar
Přispěvatelé:	Tanatar, Bilal
Rok vydání:	1995
Předmět:	Momentum Condensed matter physics Phonon Mean free path Chemistry Quantum wire Density of states General Materials Science Electron Atomic physics Perturbation theory Condensed Matter Physics Random phase approximation
Zdroj:	Journal of Physics: Condensed Matter
ISSN:	1361-648X 0953-8984
DOI:	10.1088/0953-8984/7/48/002
Popis:	A fully dynamical and finite-temperature study of the electron momentum relaxation rate and mean free path in a coupled system of electrons and bulk LO phonons in a quantum wire structure is presented. Electron-electron and electron-phonon interactions are treated on an equal footing within the leading-order perturbation theory and random-phase approximation. It is demonstrated that coupled-mode effects drastically change the transport properties of the system at low temperatures. In particular, the 'plasmon-like' and 'LO-phonon-like' excitations yield comparable rates which, as a consequence of the singular nature of the 1D density of states, can be large at the threshold. This is in contrast to room temperature results where only the LO-phonon mode contributes significantly to the rate.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::22f2e08762ca8c923c4cea4e08e12482 https://doi.org/10.1088/0953-8984/7/48/002 Zobrazit plný text záznamu