Self-organized quantum dots of zinc-blende MnTe grown by molecular beam epitaxy
作者： Shinji Kuroda , Yoshikazu Terai , Kôki Takita , Tsuyoshi Okuno , Yasuaki Masumoto
DOI: 10.1016/S0022-0248(98)80058-4
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摘要: Abstract The successful growth by molecular beam epitaxy (MBE) of self-organized quantum dots (QDs) zinc-blende (ZB) MnTe onto CdTe(1 0 0) is reported. Mn and Te fluxes were supplied either simultaneously (conventional MBE) or alternately (atomic layer — ALE) the surface to form MnTe. Atomic-force microscope measurements for uncapped samples revealed that cone-shaped formed in both two methods, however with different sizes. diameter height are, respectively, given typically D = 140 ± 10 nm h 70 QDs grown conventional MBE, 60 5 8 1 ALE. In photoluminescence (PL) time-resolved PL measurements, a broad emission band due 2+ d—d transition was observed at 2.02 eV. Its decay time found be order several tens hundreds nanoseconds, which shorter than those from ZBMnTe films three orders.
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