Abstract
Heteroepitaxial thin films of Cu-based oxychalcogenides, LnCuOCh (Ln = La, Pr and Nd; Ch = mixture of S and Se), were fabricated and their resulting film structures were characterized. A reactive solid-phase epitaxy method successfully yielded heteroepitaxial films on MgO(001) substrates. A high-resolution electron microscopic examination of a LaCuOS film revealed a sharp film-substrate interface. Four-axes high-resolution X-ray diffraction measurements revealed that crystalline lattices in the films are fully relaxed and that the crystallographic orientation is (001)[110] LnCuOCh || (001)[110] MgO. Furthermore, systematic variations in the lattice constant by lanthanide or chalcogen ion substitutions were observed.
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81.10.Jt; 81.15.-z; 81.15.Np; 68.55.-a; 81.20.-n
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Hiramatsu, H., Ueda, K., Takafuji, K. et al. Heteroepitaxial growth of wide gap p-type semiconductors: LnCuOCh (Lr=La, Pr and Nd; Ch=S or Se) by reactive solid-phase epitaxy. Appl. Phys. A 79, 1517–1520 (2004). https://doi.org/10.1007/s00339-004-2836-2
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DOI: https://doi.org/10.1007/s00339-004-2836-2