Liebscher, W., Phichit, S., Afshar, N., Yassine, M., Ambacher, O. (2026). 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. https://doi.org/10.1063/5.0316761