Abstract
We investigate, experimentally and theoretically, the epitaxy of body-centered-cubic Fe on hexagonal GaN. For growth on the Ga-polar GaN(0001) surface we find the well-known Pitsch-Schrader orientation relationship between Fe and GaN. On the N-polar $\text{GaN}(000\overline{1})$ surface we observe coexistence between the familiar Burgers orientation and a new orientation in which the Fe(001) plane is parallel to $\text{GaN}(000\overline{1})$. This ``cube-on-hexagon'' orientation constitutes the high-symmetry link required for constructing a symmetry diagram for bcc/hcp systems in which all orientation relationships are connected by simple rotations.
Published Version
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