Accession Number : ADA331431

Title :   Wave-Packet Analysis of Electron-Phonon Interaction in the Wigner Formalism

Corporate Author : MODENA UNIV (ITALY) IST DI FISICA

Personal Author(s) : Brunetti, R. ; Jacoboni, C.

PDF Url : ADA331431

Report Date : 1996

Pagination or Media Count : 20

Abstract : A theoretical and computational analysis is presented of the motion of a single one-dimensional electron, represented by a wave packet of given average momentum and position, in a fixed potential profile in presence of electron phonon interaction. The electron propagation can take place with or without an external bias. A perturbative approach is used in the theoretical framework of the Wigner function accounting for the continuous quantum dynamical evolution of the scattering process. The unperturbed hamiltonian contains the one-dimensional potential profile and the external field, while the electron phonon coupling potential is considered as the perturbation hamiltonian. Computational results are presented for the case of an electron propagating (1) without applied forces, (2) through a region where a uniform electric field is applied, and (3) in a double barrier potential in resonance conditions due to the relevance of these physical cases for practical applications.

Descriptors :   *ELECTRON TRANSPORT, *PHONONS, *WAVE PACKETS, QUANTUM THEORY, ELECTRON SCATTERING, ELECTRIC FIELDS, ELECTRONS, ITALY, QUANTUM ELECTRONICS, PERTURBATIONS, HAMILTONIAN FUNCTIONS, PARTICLE COLLISIONS, MOMENTUM TRANSFER, MEAN FREE PATH.

Subject Categories : Nuclear Physics & Elementary Particle Physics
      Quantum Theory and Relativity

Distribution Statement : APPROVED FOR PUBLIC RELEASE