科研之友
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摘要
The study of a particle with position-dependent effective mass (pdem), within a double heterojunction is extended into the complex domain-when the region within the heterojunctions is described by a non-Hermitian PT-symmetric potential. After obtaining the exact analytical solutions, the reflection and transmission coefficients are calculated and plotted as a function of the energy. It is observed that at least two of the characteristic features of non-Hermitian PT symmetric systems-namely left/right asymmetry and anomalous behaviour at spectral singularity, are preserved even in the presence of pdem. The possibility of charge conservation is also discussed.
- 出版日期2012-5-11
