Open AccessStudy of tunneling and oscillation in a GaAs/〖Al〗_(0.3) 〖Ga〗_(0.7) As superlattice: using transfer matrix method
Author(s) -
Shankar Prasad Shrestha,
Nabin Bhusal,
S. Byahut,
C. K. Sarkar
Publication year - 2021
Publication title -
bibechana
Language(s) - English
Resource type - Journals
ISSN - 2382-5340
DOI - 10.3126/bibechana.v18i1.27450
Subject(s) - quantum tunnelling , superlattice , oscillation (cell signaling) , transfer matrix , boundary value problem , matrix (chemical analysis) , schrödinger equation , physics , boundary (topology) , electron , quantum mechanics , condensed matter physics , mathematics , mathematical analysis , chemistry , computer science , biochemistry , chromatography , computer vision
The study of superlattice (SL) system in lower dimensions, which shows tunneling and oscillation of particles, is very interesting from the point of view of fundamental physics and is important for devices. Here, we present results of our calculations related to tunneling/oscillations in a general SL system using a Symmetrical Quadruple Well (SQW) potential. This class of problems is handled using a transfer matrix (T-matrix), which is obtained by taking the solution of Schroedinger equation with appropriate boundary conditions on either side of SQW and then repeatedly applying it for the SL system. The electron wave functions in the system are found to be either in a symmetric or an anti-symmetric state with a very small energy difference between the two, leading to oscillations between these states. In this study, probability density and period of oscillation of the particle in SQW is calculated. The result is useful for high frequency operations in devices using SL.
BIBECHANA 18 (2021) 91-99