A. Y. Polyakov
School of Advanced Materials Engineering and Research Center of Advanced Materials Development, Chonbuk National University; National University of Science and Technology MISiS
Russian Federation

Jeonju, Korea; 4 Leninsky Prospekt, Moscow 119049, Russia

Jin-Hyeon Yun
School of Advanced Materials Engineering and Research Center of Advanced Materials Development, Chonbuk National University
Korea, Republic of

Jeonju

A. S. Usikov
Nitride Crystals, Inc.; ITMO University (Saint Petersburg National Research University of Information Technologies, Mechanics and Optics)
Russian Federation

Deer Park, USA; 49 Kronverksky Prospekt, St. Petersburg, 197101 Russia

E. B. Yakimov
National University of Science and Technology MISiS; nstitute of Microelectronics Technology and High Purity Materials, Russian Academy of Science
Russian Federation

4 Leninsky Prospekt, Moscow 119049; 6 Academician Ossipyan Str., Chernogolovka, Moscow Region, 142432

N. B. Smirnov
National University of Science and Technology MISiS; Federal state research and design institute of rare metal industry (JSC «Giredmet»)
Russian Federation

4 Leninsky Prospekt, Moscow 119049; 5–1 B. Tolmachevsky Per., Moscow 119017

K. D. Shcherbachev
National University of Science and Technology MISiS,
Russian Federation

4 Leninsky Prospekt, Moscow 119049

H. Helava
Nitride Crystals, Inc.
United States

Deer Park

Y. N. Makarov
Nitride Crystals, Inc.
United States

Deer Park

S. Y. Kurin
Nitride Crystals Ltd.
Russian Federation

27 Engels Prospekt, St. Petersburg 194156

N. M. Shmidt
Ioffe Physical–Technical Institute of the Russian Academy of Sciences
Russian Federation

26 Politekhnicheskaya Str., St. Petersburg 194021

O. I. Rabinovich
National University of Science and Technology MISiS
Russian Federation

4 Leninsky Prospekt, Moscow 119049

S. I. Didenko
National University of Science and Technology MISiS
Russian Federation

4 Leninsky Prospekt, Moscow 119049

S. A. Tarelkin
National University of Science and Technology MISiS; Technological Institute for Superhard and Novel Carbon Materials
Russian Federation

4 Leninsky Prospekt, Moscow 119049; 7a Tsentralnaya Str., Troitsk, Moscow 142190

B. P. Papchenko
ITMO University (Saint Petersburg National Research University of Information Technologies, Mechanics and Optics)
Russian Federation

49 Kronverksky Prospekt, St. Petersburg, 197101

In-Hwan Lee
School of Advanced Materials Engineering and Research Center of Advanced Materials Development, Chonbuk National Universit
Korea, Republic of

Jeonju