Resonance condition for asymmetrical triple-barrier structures

✍ Scribed by X.D Zhao; H Yamamoto; Y Nakano; K Taniguchi

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 146 KB
• Volume: 23
• Category: Article
• ISSN: 0749-6036
• DOI: 10.1006/spmi.1996.0163

✦ Synopsis

The resonance condition for triple-barrier structures with arbitrary potential is studied systematically. The quasisymmetrical triple-barrier (QST) resonance mode and the quasiasymmetrical double-barrier (QAD) resonance mode may both exist in asymmetric triplebarrier structures. The QST consists of two submodes: a normal mode (doublet) and a degenerate mode (singlet). The critical condition for distinguishing the two modes is examined. It is confirmed that there are both unity resonant transmission and below-unit resonant transmission in the asymmetrical triple-barrier structure. Furthermore, the wavefunctions of an electron at resonance level are calculated and the confining phenomenon is studied.