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- W1964357110 abstract "The mobility of electrons in zone-refined and impurity-doped AgCl and AgBr crystals at high electric fields has been investigated over the temperature range from $T={4}^{ensuremath{circ}}$ K to 77ifmmode^circelsetextdegreefi{}K in order to examine the energy-momentum relation and to clarify the scattering mechanisms of slow and fast electrons in ionic crystals. The highest-purity crystals were obtained from ingots zone-refined 300 times in halogen atmospheres. Several crystals containing known amounts of iron impurity were also investigated. A fast-pulse technique was used to observe both the transient photoconductivity and the Hall mobility of the photo-electrons. The electrode geometry of Redfield was used in the Hall-mobility measurements. At high electric fields, the photocurrent $Q(T,E)$ was found to be proportional to the square root of the electric field $E$ in pure AgCl and AgBr crystals at low temperatures. The Hall mobility ${ensuremath{mu}}_{H}(T,E)$ of fast electrons in pure crystals at low temperatures was observed to be a decreasing function of the electric field, thus explaining the $Q(T,E)$ data. Such nonlinear behavior is weaker in the impurity-doped crystals and gradually disappears even in pure crystals as the temperature rises, for the same range of the electric fields. These results are discussed in terms of the hot-electron theory. An energy-dissipation mechanism similar to the scattering due to the acoustical mode of lattice vibrations is suggested as effective for fast electrons in ionic crystals." @default.
- W1964357110 created "2016-06-24" @default.
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- W1964357110 date "1967-07-15" @default.
- W1964357110 modified "2023-10-09" @default.
- W1964357110 title "Nonlinear Transport Phenomena in AgCl and AgBr at High Electric Field" @default.
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- W1964357110 doi "https://doi.org/10.1103/physrev.159.761" @default.
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