CdTe/PbTe异质结二维电子气的电学特性研究

最近我们在国际上首次发现了CdTe/PbTe(111)极性界面存在高密度二维电子气（2DEG）现象[APL,100,182104(2012)]，该项目拟对CdTe/PbTe 极性界面2DEG的电子输运特性开展深入研究。采用分子束外延方法构筑高电子浓度、高电子迁移率的CdTe/PbTe异质结2DEG结构，通过低温磁输运的测量和表征（包括Shubnikov-de Haas磁阻振荡，量子Hall效应和Rashba自旋-轨道劈裂等）理解CdTe/PbTe异质结2DEG在低温下的行为。在此基础上，研究高电子迁移率CdTe/PbTe异质结场效应晶体管和自旋极化晶体管器件，探明其在微纳电子学和自旋电子学领域的潜在应用前景。

We have recently discovered high-density two dimensional electron gas (2DEG) at the polar interface of CdTe/PbTe heterojunctions[APL,100, 182104(2012)]. This project is proposed for the investigation of the properties of electron transport in the polar CdTe/PbTe interface. Molecular beam epitaxy is to be used for the epitaxial growth of CdTe/PbTe 2DEG structures that have high density of elelctrons and high mobilities of electrons.To understand the low temperature behaviors of the 2DEG in the CdTe/PbTe heterojunctions,low temperature magnetotransport characterizations, including Shubnikov-de Haas oscillations, quantum Hall effect and Rashba spin-orbit interaction, will be conducted. Furthermore,high electron mobility field effect transistors and spin polarized transistors that use CdTe/PbTe 2DEG as channels are to be fabricated which will demonstrate potentials of the applications in micro-nano electronics and spintronics.