Low-Temperature Growth of InN Films on (111)GaAs Substrates

Abstract
InN films have been grown on (111)GaAs substrates by radio frequency magnetron sputtering. It is revealed that epitaxial InN films with wurtzite structure can be obtained at a growth temperature as low as 100°C. InN grown directly on (111)GaAs is highly oriented in the c-plane, but lacks in-plane uniformity. A buffer layer formed by presputtering the substrate in nitrogen plasma can significantly improve the in-plane orientation, producing single-crystal InN.