Resonant Tunneling Properties in The Sawtooth Triple Barrier Structures

Abstract

The resonance tunneling properties of sawtooth triple barrier double-well structures were investigated using the non-equilibrium Green's functions method. The dependence of resonance energies on barrier height and width and well widths was investigated. The tunneling feature of the structure under the electric field was investigated. It has been observed that the transmission probability, resonance tunneling energy, and resonance peak intensity are sensitively dependent on the applied electric field and structure parameters. By choosing the appropriate structure, devices that provide resonance transition at the desired energy can be designed in the desired energy level ranges. Thus, this study can provide a basis for switching and oscillator source nano-device designs.

Keywords

• Green Function
• Finite difference method
• Sawtooth triple barrier
• Resonant tunneling
• Quantum wells

Abstract

Testere dişli üçlü bariyerli çift kuyulu yapıların rezonans tünelleme özellikleri, denge dışı Green fonksiyonları yöntemi kullanılarak incelenmiştir. Rezonans enerjilerinin bariyer yüksekliği ve genişliği ile kuyu genişliklerine bağımlılığı araştırılmıştır. Yapının elektrik alan altındaki tünelleme özelliği incelenmiştir. İletim olasılığı, rezonans tünelleme enerjisi ve rezonans pik şiddetinin, uygulanan elektrik alan ve yapı parametrelerine hassas bir şekilde bağlı olduğu gözlemlenmiştir. Uygun yapı seçilerek istenilen enerjide rezonans geçişi sağlayan cihazlar istenilen enerji seviyesi aralıklarında tasarlanabilir. Böylece bu çalışma, anahtarlamalı ve osilatör kaynağı nano-cihaz tasarımlarına temel oluşturabilir.

Keywords

• Denge-dışı Green fonksiyonu
• Sonlu farklar metodu
• Testere dişi üçlü bariyer
• Rezonant tünelleme
• Kuantum kuyuları

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