Current Rectification through a Single-Barrier Resonant-Tunneling Quantum Structure
We propose a simple quantum structure which exhibits resonant tunneling under one bias and simple tunneling under the opposite one, thus acting as a rectifier. The diode consists of a single laterally-indented barrier. Due to its particular conduction-band profile, electrons undergo resonant tunneling when the bias creates a band-profile triangular well which can contain a resonant state aligned to the emitter Fermi energy. A diode with an active layer of approximate to 100 Angstrom, realized by AlGaAs/GaAs, has a Rectification Ratio, calculated at the current-peak bias at resonance, of approximate to 100. This value can be enhanced by putting in series several elements of this kind. (C) 1995 Academic Press Limited
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Attila jozsef univ, h-6720 szeged, hungary. Papp, g, ecole polytech fed lausanne, phb ecublens, inst phys appl, ch-1015 lausanne, switzerland.
ISI Document Delivery No.: TA849
Record created on 2006-10-03, modified on 2016-08-08