Disorder effects on tunneling through one-dimensional double-barrier quantum-well structures: A coherent-potential approximation
- 15 February 1993
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 47 (8) , 4372-4378
- https://doi.org/10.1103/physrevb.47.4372
Abstract
We present a formalism for studying the disorder effects on electron tunneling through one-dimensional double-barrier quantum-well structures based on the coherent-potential approximation. This formalism enables us to calculate the configuration-averaged transmission coefficients in a nonperturbative way. It is shown that elastic scattering reduces and broadens the resonance peak, and also destroys its Lorentzian behavior. For sharp resonance structures, the transmission coefficient directly reflects the structures in the density of states within the well. The result obtained using this method agrees well with direct numerical simulation.Keywords
This publication has 24 references indexed in Scilit:
- Disorder-assisted tunneling through a double-barrier resonant-tunneling structurePhysical Review B, 1991
- Interface roughness and asymmetric current-voltage characteristics in resonant tunnellingSemiconductor Science and Technology, 1990
- Disorder-assisted tunneling through a double-barrier structurePhysical Review Letters, 1990
- Elastic-scattering effects on resonant tunneling in double-barrier quantum-well structuresPhysical Review B, 1990
- Tunneling through asymmetric double-barrier quantum-well heterostructuresJournal of Applied Physics, 1990
- Investigations on resonant tunneling in III-V heterostructures: Comparison between experimental data and model calculationsJournal of Applied Physics, 1989
- Investigations on resonant tunneling in III-V heterostructuresJournal of Applied Physics, 1989
- Interface-roughness and island effects on tunneling in quantum wellsJournal of Applied Physics, 1988
- Resonant tunneling in semiconductor double barriersApplied Physics Letters, 1974
- Microscopic Theory of Tunneling: General Theory and Application to the Static ImpurityPhysical Review B, 1972