ScN/GaN(11̅00): A New Platform for the Epitaxy of Twin-Free Metal–Semiconductor Heterostructures
Philipp John,
Achim Trampert,
Duc Van Dinh
et al.
Abstract:We study the molecular beam epitaxy of rock-salt ScN on the wurtzite GaN(11̅ 00) surface. To this end, ScN is grown on freestanding GaN(11̅ 00) substrates and self-assembled GaN nanowires exhibiting (11̅ 00) sidewalls. On both substrates, ScN crystallizes twin-free thanks to a specific epitaxial relationship, namely ScN(110) [001]∥GaN(11̅ 00)[0001], providing a congruent, low-symmetry interface. The 13.1% uniaxial lattice mismatch occurring in this orientation mostly relaxes within the first few monolayers o… Show more
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