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- W2060607427 abstract "The effective mass of an electron determined from Zeeman splitting of the donor 2${mathit{P}}_{ifmmodepmelsetextpmfi{}1}$ levels in some GaAs crystals shows a strong magnetic-field dependence. The Zeeman effective mass reported in this paper is always greater than the cyclotron effective mass for all magnetic fields up to 40 kG. The Zeeman effective mass goes through a maximum at approximately 12 kG and tends toward the cyclotron effective mass at 40 kG. The Zeeman mass was deduced from both the orbital and spin splittings of the 2P donor levels. The magnetic-field splittings were determined from radiative transitions resulting from the collapse of a donor-bound exciton leaving the terminal state in an excited state. The magnitude of the effect is greater than that previously observed in GaAs and also is in the opposite direction, an increase rather than a decrease in mass. It is concluded that this anomaly could be explained on the basis of level mixing resulting from static electric fields present throughout the crystal due to ionized impurity centers. In the present case, the ionized impurity centers are not uniformly distributed throughout the crystal. Although there are some differences between the masses obtained from orbital splitting and the masses obtained from spin splitting, the shapes of the curves are quite similar." @default.
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- W2060607427 date "1990-12-15" @default.
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- W2060607427 title "Electron-mass anomaly as determined from the Zeeman effect of the donor 2Plevels in GaAs" @default.
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- W2060607427 doi "https://doi.org/10.1103/physrevb.42.11208" @default.
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