We study the acoustoelectric effect in two-dimensional materials like transition metal dichalcogenide monolayers located on a nonpiezoelectric substrate and exposed to the Rayleigh surface acoustic waves. We investigate the behavior of the Hall component of the electric current density which appears due to the trigonal warping of the valleys in k space. We calculate the spectrum of the current density and study its dependence on the electron effective lifetime and density in the sample. We distinguish between the drift and diffusive components of the current and show which components turn out predominant. Furthermore, we compare the effect of the Rayleigh and Bluestein-Gulyaev acoustic waves, which appear if the sample is located on a piezoelectric substrate.

中文翻译：

---

暴露在瑞利表面声波中的二维Dirac材料中的声电效应

我们研究二维材料中的声电效应，例如位于非压电衬底上并暴露于瑞利表面声波的过渡金属二卤化硅单分子层。我们研究了电流密度的霍尔分量的行为，这是由于k空间中的谷的三角扭曲而出现的。我们计算电流密度的频谱，并研究其对样品中电子有效寿命和密度的依赖性。我们区分了电流的漂移分量和扩散分量，并显示出哪些分量占主导地位。此外，我们比较了瑞利声波和Bluestein-Gulyaev声波的影响，如果样本位于压电基板上，则会产生声波。