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- 01/01/2007
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- 01/01/2006
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- 06/10/2004
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- 04/06/2008
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- 01/01/2003
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No full text在变缓冲层高迁移率晶体管(MM-HEMT)器件中,二维电子气的输运性质对器件性能起着决定作用.通过低温下二维电子气横向电阻的量子振荡现象,结合变温度的Hall测量,系统研究了不同In组分沟道MM-HEMT器件中子带电子迁移率和浓度随温度的变化关系.结果表明,沟道中In组分为0.65的样品,材料电学性能最好,In组分高于0.65的样品,严重的晶格失配将产生位错,引起迁移率下降,大大影响材料和器件的性能
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