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- W2070242803 endingPage "11766" @default.
- W2070242803 startingPage "11759" @default.
- W2070242803 abstract "Substitution of an electron donor such as phosphorus for a carbon or boron atom in p-type semiconducting boron carbides is expected to reduce the hole concentration. Phosphorus-doped boron carbide samples have been prepared by hot isostatic pressing with homogeneous dopant levels of up to one phosphorus atom per ten unit cells. Raman spectroscopy and x-ray diffraction confirm the presence of phosphorus within two-atom intericosahedral chains. The high-temperature dc conductivities of doped samples were substantially lower than those of undoped boron carbides. This effect was due to a combination of reduced carrier concentrations and increased hopping activation energies. The low-temperature ac conductivity of doped samples is also smaller than that of undoped samples. However, the number of carriers participating in the ac conduction is a very small fraction (0.1%) of the total carrier density." @default.
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- W2070242803 date "1993-10-15" @default.
- W2070242803 modified "2023-09-27" @default.
- W2070242803 title "Phosphorus doping of boron carbides" @default.
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- W2070242803 doi "https://doi.org/10.1103/physrevb.48.11759" @default.
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