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- W1991245440 abstract "The effect of the formation of the overcharged Be acceptor center, ${mathrm{Be}}^{+}$, on transient photoconductive response has been studied in Ge:Be. The response of the photocurrent to step-function changes in photon backgrounds (ensuremath{lambda}=40 ensuremath{mu}m) is dominated by a slow transient with time constants on the order of 0.1--1.0 s at temperatures of 2--3 K. The activation energy of the hole-trapping phenomenon has been measured to be 4.3 meV. Application of 9.8ifmmodetimeselsetexttimesfi{}${10}^{8}$ dyn/${mathrm{cm}}^{2}$ uniaxial stress, sufficient to eliminate ${mathrm{Be}}^{+}$ formation, also eliminates the slow-transient response. Modeling of the transient response, in a unipolar system where the trapping mechanism is assumed to be hole trapping by ${mathrm{Be}}^{0}$, results in good agreement with the experimental results." @default.
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- W1991245440 date "1989-02-15" @default.
- W1991245440 modified "2023-09-25" @default.
- W1991245440 title "Transient photoconductivity in Ge:Be due toBe+formation" @default.
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- W1991245440 doi "https://doi.org/10.1103/physrevb.39.3677" @default.
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