论文标题
弯曲变形和双层二维晶体的崩溃，层中层中的激子
Flexural deformations and collapse of bilayer two-dimensional crystals by interlayer exciton
论文作者
论文摘要
我们开发了在原子上薄的双层中形成的层间激子 - 波隆的一致理论。电子与位于不同层中的孔之间的库仑吸引力导致其弯曲变形，并提供了激子耦合与挠性声子的有效机制。我们研究层张力对极化物结合能的影响和有效的质量，从而导致弱和强耦合方案中的张力抑制极性形成。我们还考虑了非线性与平面晶格位移之间的相互作用相关的作用，并获得了层粘性的标准，由于电荷载体之间的库仑吸引力，激子倒塌了。
We develop a consistent theory of the interlayer exciton-polaron formed in atomically-thin bilayers. Coulomb attraction between an electron and a hole situated in the different layers results in their flexural deformation and provides an efficient mechanism of the exciton coupling with flexural phonons. We study the effect of layers tension on the polaron binding energy and effective mass leading to suppression of polaron formation by the tension both in the weak and strong coupling regimes. We also consider the role of the nonlinearity related to the interaction between the out- and in-plane lattice displacements and obtain the criterion of the layer sticking, where the exciton collapses, due to the Coulomb attraction between the charge carriers.
