A microscopic approach for the simulation of quantum-transport phenomena in systems with open boundaries is proposed. We show that the application of the conventional Wigner-function formalism to this problem leads to unphysical results, like injection of coherent electronic states from the contacts. To overcome such basic limitation, we propose a generalization of the standard Wigner-function formulation, able to properly describe the incoherent nature of carrier injection at the device spatial boundaries. The latter constitutes a quantum mechanical derivation of the phenomenological injection model commonly employed in the simulation of open quantum devices.
Microscopic modelling of open systems: A generalized Wigner-function approach / PROIETTI ZACCARIA R; IOTTI R.C.; ROSSI F. - In: JOURNAL OF COMPUTATIONAL ELECTRONICS. - ISSN 1569-8025. - STAMPA. - 2(2003), pp. 141-145. [10.1023/B:JCEL.0000011415.34531.b1]
|Titolo:||Microscopic modelling of open systems: A generalized Wigner-function approach|
|Data di pubblicazione:||2003|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1023/B:JCEL.0000011415.34531.b1|
|Appare nelle tipologie:||1.1 Articolo in rivista|