论文标题
电控制的二维电子孔流体
Electrically Controlled Two-Dimensional Electron-Hole Fluids
论文作者
论文摘要
我们研究了双门控电子双层的电子特性，其中两层被完美不透明的隧道屏障隔开。将静电和热力学分析与相互作用系统化学电位的平均场理论估计相结合，我们解释了电子和孔密度对两个栅极电压的依赖性。由于电子和中立的孔都会发生化学势跳跃，因此门电压参数空间中有一个有限的区域，其电子和孔密度相等。在该策略中，电子孔对密度仅取决于两个栅极电压的总和。我们能够通过允许层间隧穿并使用非平衡稳态运输图片来解释对电控制双层的最新实验研究。
We study the electronic properties of dual-gated electron-hole bilayers in which the two layers are separated by a perfectly opaque tunnel barrier. Combining an electrostatic and thermodynamic analysis with mean-field theory estimates of interacting system chemical potentials, we explain the dependence of the electron and hole densities on the two gate voltages. Because chemical potential jumps occur for both electrons and holes at neutrality, there is a finite area in gate voltage parameter space over which electron and hole densities are equal. In that regime the electron-hole pair density depends only on the sum of the two gate voltages. We are able to explain a recent experimental study of electrically controlled bilayers by allowing for interlayer tunneling and using a non-equilibrium steady-state transport picture.
