Ga induced superstructures as templates for lattice matched hetroepitaxial growth of GaN on Si(111) substrate

Journal Article · Mon Nov 29 04:00:00 EST 2010 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3522830· OSTI ID:21518190

Kumar, Praveen; Kuyyalil, Jithesh; Shivaprasad, S M ^[1]

---

1. Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, 560 064 Bangalore (India)

High quality GaN is grown by plasma assisted molecular beam epitaxy on Ga induced superstructural phases of Si(111)7x7. Three stable surface phases induced by Ga adsorption, viz., (1x1), (6.3x6.3), and ({radical}3x{radical}3)R30 deg., are employed as templates to grow epitaxial (0001) GaN thin films. GaN grown on Si({radical}3x{radical}3)R30 deg. -Ga is found to be highly crystalline with intense (0002) x-ray diffraction and photoluminescence peaks with low full width at half maximum, low surface roughness, and stoichiometric surface composition. The high quality of these GaN films formed at a low temperature of 400 deg. C is explained by the integral (x2) lattice matching between the unit cell of GaN and the ({radical}3x{radical}3) phase. The experiments demonstrate a plausible approach of adsorbate induced surface modifications as templates for III-V hetroepitaxy on Si surfaces.

• OSTI ID: 21518190
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 22 Vol. 97; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ADSORPTION
COHERENT SCATTERING
CRYSTAL GROWTH
CRYSTAL GROWTH METHODS
DIFFRACTION
ELEMENTS
EMISSION
EPITAXY
FILMS
GALLIUM COMPOUNDS
GALLIUM NITRIDES
LATTICE PARAMETERS
LAYERS
LUMINESCENCE
MATERIALS
MODIFICATIONS
MOLECULAR BEAM EPITAXY
NITRIDES
NITROGEN COMPOUNDS
PHOTOLUMINESCENCE
PHOTON EMISSION
PLASMA
PNICTIDES
ROUGHNESS
SCATTERING
SEMICONDUCTOR MATERIALS
SEMIMETALS
SILICON
SORPTION
STOICHIOMETRY
SUBSTRATES
SURFACE PROPERTIES
SURFACE TREATMENTS
SURFACES
THIN FILMS
X-RAY DIFFRACTION