作者: H. L. Störmer , A. C. Gossard , W. Wiegmann , K. Baldwin
DOI: 10.1063/1.92604
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摘要: The electron mobility of single modulation‐doped GaAs‐(AlGa)As heterojunctions is strongly dependent on density and Al concentration. A low‐temperature persistent photoconductive effect employed to vary the areal continuously within a sample by nearly factor 3. Over this range increases monotonically as much 4, quasilinear with density. At equivalent carrier concentrations lower concentration show higher mobilities. low temperatures peak 365 000 cm2/Vs found at an 7.0×1011 cm−2 interparticle spacing three‐dimensional 5.9×1017 cm−3.