Open AccessAnalysis of the AlN phase transition on a sapphire surface within a universal 2D lattice gas model in MBE
Author(s) -
D. S. Milakhin,
Т. В. Малин,
В. Г. Мансуров,
Yu. G. Galitsyn,
К. С. Журавлев
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1851/1/012005
Subject(s) - sapphire , phase transition , lattice (music) , materials science , condensed matter physics , thermodynamics , laser , optics , physics , acoustics
The AlN phase transition on the (0001) Al 2 O 3 surface was investigated. It was experimentally estimated that the AlN formation rate as a function of temperature has a different character in two temperature regions. In the region of relatively low temperatures ( T 1210 K), the formation of an ordered AlN phase is determined by a continuous two-dimensional phase transition within the filled AlN-lattice-gas cells formed on the sapphire surface. A three-parameter isotherm is proposed to describe the process. The observed phase transition in the AlN lattice gas is a continuous phase transition or a second-order transition.