Ultra-wide bandgap, conductive, high mobility, and high quality melt-grown bulk ZnGa2O4 single crystals oleh Zbigniew Galazka, Steffen Ganschow, Robert Schewski, Klaus Irmscher, Detlef Klimm, Albert Kwasniewski, Mike Pietsch, Andreas Fiedler, Isabelle Schulze-Jonack, Martin Albrecht, Thomas Schröder, Matthias Bickermann