一、引言用水平法生长GaAs晶体时,常常出现孪晶。很多人对这种孪晶形成的原因及规律做了探讨,目前尚有争论。我们的实验表明,当熔体与石英舟发生浸润时,确实能导至孪晶生成。但也有大量现象表明,即 I. INTRODUCTION Twins are often found when growing GaAs crystals by the horizontal method. Many people have discussed the causes and laws of the formation of such twins, and there is still controversy. Our experiments show that twins can indeed be induced when the melt and quartz boat infiltrate. But there are also a large number of phenomena that