Temperature field and fluid flow in ammonothermal growth of GaN during etch-back and crystal growth for a retrograde solubility configuration - Schimmel, Saskia; Tomida, Daisuke; Ishiguro, Tohru; Honda, Yoshio; Chichibu, Shigefusa F.; Amano, Hiroshi (International Workshop on Nitride Semiconductors, 2022)