Journal
APPLIED PHYSICS LETTERS
Volume 79, Issue 14, Pages 2243-2245Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1405422
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GaN quantum dots were formed on an AlGaN/SiC substrate by gas-source molecular beam epitaxy using a self-assembling technique with Ga droplets. The photoluminescence properties of the quantum dots obtained at several crystallization temperatures were investigated. High photoluminescence intensity was observed from GaN quantum dots formed without a wetting layer at a crystallization temperature of 700 degreesC. Single-electron transistors formed using GaN quantum-dot islands exhibited Coulomb blockade phenomena with negative conductance at 2.7 K and a clear Coulomb staircase at 200 K. (C) 2001 American Institute of Physics.
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