Growth and characterization of β-InN films on MgO: the key role of a β-GaN buffer layer in growing cubic InN
Document title: Growth and characterization of β-InN films on MgO: the key role of a β-GaN buffer layer in growing cubic InN
Journal: Revista mexicana de física
Database: PERIÓDICA
System number: 000360954
ISSN: 0035-001X
Authors: 1
1
1
1
1
Institutions: 1Universidad Autónoma de San Luis Potosí, Coordinación para la Innovación y la Aplicación de la Ciencia y la Tecnología, San Luis Potosí. México
Year:
Season: Abr
Volumen: 58
Number: 2
Pages: 144-151
Country: México
Language: Inglés
Document type: Artículo
Approach: Analítico, teórico
English abstract Cubic InN samples were grown on MgO (001) substrates by gas source molecular beam epitaxy (GSMBE). In general, we find that InN directly deposited onto the MgO substrate results in polycrystalline or columnar films of hexagonal symmetry. We find that adequate conditions to grow the cubic phase of this compound require the growth of an initial cubic GaN buffer interlayer (β–tGaN) on the MgO surface. Subsequently, the growth conditions were optimized to obtain good photoluminescence (PL) emission. The resultant InN growth is mostly cubic, with very small hexagonal inclusions, as confirmed by X–ray diffraction (XRD) and scanning electron microscopy (SEM) studies. Good crystalline quality requires that the samples to be grown under rich Indium metal flux. The cubic β–tInN/GaN/MgO samples exhibit a high signal to noise ratio for PL at low temperatures (20 K). The PL is centered at 0.75 eV and persists at room temperature
Disciplines: Física y astronomía,
Ciencia y tecnología
Keyword: Física de materia condensada,
Tecnología,
Haces moleculares,
Semiconductores,
Nitruros
Keyword: Physics and astronomy,
Science and technology,
Condensed matter physics,
Technology,
Molecular beams,
Semiconductors,
Nitrides
Full text: Texto completo (Ver PDF)