Epitaxial growth of heavily doped n^+ -Ge layers using metal-organic chemical vapor deposition with in situ phosphorus doping

We report the epitaxy of n-Ge layer with in situ phosphorus (P)-doping using metal-organic chemical vapor deposition (MOCVD) method with tertiary-butyl-germane and tri-ethyl-phosphine precursors. The crystalline and electrical properties of n-Ge epitaxial layers have been investigated using X-ray diffraction, atomic force microscopy, and Hall effect measurements in detail. In situ P-doping with MOCVD demonstrates the incorporation of P in Ge as high as 1 × 10^20 cm^−3. The electron concentration in P-doped Ge epitaxial layers are achieved as high as 1.7 × 10^19, 1.8 × 10^19, and 2.2 × 10^18 cm^−3 at growth temperatures of 400, 350, 320 °C, respectively.ファイル公開日: 2020/01/01journal articl

干潟の水族資源 (第3報) ： 韓国・西海岸咸平湾における持続的資源利用と管理 : カキの採捕活動を中心に

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Modeling and simulation of gyrotrons

Modeling and simulation of gyrotrons have two interconnected aspects, namely beam formation in the election-optical system (EOS) and beam-field interaction in the resonant cavity. In this paper we address both problems and outline the physical models and numerical techniques implemented in our problem-oriented package of experiments carried out at FIR FU Center and directed towards analysis and optimization of the existing devices of the Gyrotron FU Series an well as applied to the development of simulation-based design (SBD) of a novel high harmonic gyrotron with axis encircling electron beam and permanent magnet system.research repor

Supplementary Descriptions of the Coccinellid Larvae of Japan : (Coleoptera)

departmental bulletin pape

Cumulative mortality among HIV-exposed children versus HIV-unexposed children over time.

<p>Cumulative mortality among HIV-exposed children versus HIV-unexposed children over time.</p

Risk Factors for Child Death.

1<p>HIV-exposed is considered those children with known exposure from birth (ie. mother was tested in ANC or on the labour ward).</p>2<p>Controlled for previous child death, birth weight, age.</p>3<p>Controlled for HIV-exposure, birthweight, age.</p>4<p>Controlled for HIV-exposure, previous child death, age.</p>5<p>Controlled for HIV-exposure, age (information not available for birthweight and previous child death for those mothers who had died).</p

Child Mortality amongst HIV-infected and HIV-uninfected mothers.

*<p>Amongst livebirths (excluding stillbirths).</p>***<p>Maternal age at time of study.</p

Risk Factors for Functional Health Restrictions Among Children Surviving to 20 months.⁽¹⁾

(1)<p>Based on Lansky Functional Health Scale.</p>a<p>Controlled for all other variables in the table.</p

Health outcomes of children surviving to 20 months by HIV-infection status.

1<p>Including 3 children born to women with seroconversion identified in the study.</p

HIV Treatment Regimen during Pregnancy.

2<p>Any of the first or second line regimens used in Malawi at the time, including: D4T+3TC+NVP, d4T+3TC/EFV, AZT+3TC/EFV, AZT+3TC/TDF/LPV/r.</p