Wiebke Liebscher, Sumita Phichit, Niloofar Afshar, Mohamed Yassine, Oliver Ambacher. "Growth of wurtzite Hf
                    <i>x</i>
                    Al1
                    <b>−</b>
                    <i>x</i>
                    N up to x 
                    <b>=</b>
                     0.39 by sputtering with bandgap shift and c/a-ratio anomaly." Applied Physics Letters, 2026. doi:10.1063/5.0316761