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Electron tunneling from an ultrathin quantum well in constant and alternating electric fields
Author(s) -
Kundrotas J.,
Dargys A.
Publication year - 1986
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221340132
Subject(s) - quantum tunnelling , electric field , electron , exponential function , quantum well , condensed matter physics , constant (computer programming) , physics , wave function , quantum , quantum mechanics , field (mathematics) , mathematics , mathematical analysis , laser , computer science , pure mathematics , programming language
The change of electron tunneling probability with time after instantaneous application of an electric field is calculated for a one‐dimensional ultrathin quantum well (QW). The electronic wave function bound to such QW is characterized by relatively large exponential tails on both sides of the QW. By solving the time dependent Schrödinger equation exactly, it is demonstrated that the tunneling rate is substantially larger than that predicted by standard approximations. This property may appear useful in constructing new ultrahigh‐speed solid state devices based on isolated QWs.