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Investigation into the Energy Band Diagram and Charge Distribution in AlGaN/GaN Double Heterostructures by Self-Consistent Poisson–Schrödinger Calculations
- Source :
- Chinese Physics Letters. 22:454-456
- Publication Year :
- 2005
- Publisher :
- IOP Publishing, 2005.
-
Abstract
- The energy band diagram and charge distribution of the unintentional doped AlGaN/GaN/AlGaN/GaN double heterostructure were obtained by self-consistent Poisson–Schrodinger calculations. The severe band tilting and high two-dimensional electron gas (2DEG) density mainly attribute to the large internal polarization intensity, which is close to a linear function of Al composition. The influence of Al composition is investigated. The results show that band tilting enlarges and 2DEG gains with Al composition, and two-dimensional hole gas occurs when Al composition reaches a certain extent. The influence of Al composition and two-dimensional hole gas (2DHG) on devices is discussed.
Details
- ISSN :
- 17413540 and 0256307X
- Volume :
- 22
- Database :
- OpenAIRE
- Journal :
- Chinese Physics Letters
- Accession number :
- edsair.doi...........329ab5eeccf28801ca9893058bbdd75e