Cited by 168GaN-based semiconductor devices and materialsSilicon Carbide Semiconductor TechnologiesSemiconductor materials and interfaces

On the incorporation of Mg and the role of oxygen, silicon, and hydrogen in GaN prepared by reactive molecular beam epitaxy

Kim, Wook, Botchkarev, A. E., Salvador, A., Popovici, G., Tang, H., Morkoç, H.·1997·Journal of Applied Physics

Abstract

Mg-doped GaN samples prepared by reactive molecular beam epitaxy have been investigated in an attempt to gain insight into the impurity incorporation and the origin of auto doping in otherwise undoped GaN films. The Hall and secondary ion mass spectroscopy data were utilized for the analysis of possible background impurities such as Si, O, and H in an effort to ascertain whether the background electron concentration is of impurity origin or native defect origin. The data appear to support the N vacancy as a possible cause of auto-n-type doping seen in undoped GaN. The effect of the ammonia flow rate on the incorporation of Mg atoms in GaN films and on the behavior of H were studied for layers grown on c-plane sapphire as well as 6H–SiC. Increased incorporation of Mg with larger ammonia flow rates is attributed to Ga vacancies and accompanying site selection. Moreover, p-GaN films grown under high ammonia flux are reported with a hole concentration, mobility, and resistivity of about 8×1017 cm−3, 26 cm2/V s, and 0.3 Ω cm, respectively.

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Crossref · 10.1063/1.365801

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  • AMPK activation during exercise is intensity-dependent.

    “Consistent with this, AMPK is activated during exercise in both rodents and humans [51-60], in an intensity-dependent manner [57,59-61].”

    From AMPK and Exercise: Glucose Uptake and Insulin Sensitivity (2013) · cites this paper as [61]

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Authors
Kim, W., Botchkarev, A. E., Salvador, A., Popovici, G., Tang, H., & Morkoç, H.
Affiliations
University of Illinois Urbana-Champaign (US)
Venue
Journal of Applied Physics
Published
1997-07-01
Volume
82
Issue
1
Pages
219-226
ISSN
  • 0021-8979 (ISSN-L)
  • 1089-7550
OpenAlex
W2033006768
Cited by
168
References
30
Citations by year
2026: 1 · 2025: 1 · 2024: 1 · 2022: 2 · 2021: 2 · 2017: 4 · 2016: 5 · 2015: 2 · 2014: 6 · 2013: 5 · 2012: 7
FWCI
9.77
Type
journal article
Language
en
Open access
closed
Locations
Journal of Applied Physics (publishedVersion)
Funders
Office of Naval Research
Topics
  • Physical Sciences › Physics and Astronomy › Condensed Matter Physics › GaN-based semiconductor devices and materials
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Silicon Carbide Semiconductor Technologies
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Semiconductor materials and interfaces
Keywords
Mg-doped GaN, reactive molecular beam epitaxy, impurity incorporation, intrinsic defects, nitrogen vacancies, Ga vacancies, site selection, ammonia flow rate, p-type GaN, hole concentration, carrier mobility, electrical resistivity, c-plane sapphire, 6H-SiC substrate

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