“Cube-on-hexagon” orientation relationship for Fe on GaN ( 000 1 ¯ ) : The missing link in bcc/hcp epitaxy

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 GaN(0001) surface we observe coexistence between t...

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Bibliographic Details
Published in:Physical review. B, Condensed matter and materials physics Condensed matter and materials physics, 2010-09, Vol.82 (12), Article 125415
Main Authors: Gao, Cunxu, Brandt, Oliver, Erwin, Steven C., Lähnemann, Jonas, Jahn, Uwe, Jenichen, Bernd, Schönherr, Hans-Peter
Format: Article
Language:English
Subjects:
BCC LATTICES
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
CRYSTAL GROWTH METHODS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CUBIC LATTICES
ELEMENTS
EPITAXY
GALLIUM COMPOUNDS
GALLIUM NITRIDES
HCP LATTICES
HEXAGONAL LATTICES
IRON
MATERIALS SCIENCE
METALS
NITRIDES
NITROGEN COMPOUNDS
ORIENTATION
PNICTIDES
SUBSTRATES
SURFACES
SYMMETRY
TRANSITION ELEMENTS
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Summary: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 GaN(0001) surface we observe coexistence between the familiar Burgers orientation and a new orientation in which the Fe(001) plane is parallel to GaN(0001). 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.
ISSN:1098-0121
1550-235X
DOI:10.1103/PhysRevB.82.125415