论文标题
库仑散射引起的有吸引力的Trion-Polariton非线性
Attractive trion-polariton nonlinearity due to Coulomb scattering
论文作者
论文摘要
从理论上讲，我们在二维材料中研究了Trion-Polariton的非线性，该材料是由库仑相互作用引起的。为了评估相互作用常数，我们通过将Trion波函数扩展到高斯基础上，可以精确地求解三体水位方程。使用这些波形，我们计算了交换过程的Trion-Polariton相互作用能，从而解决了Trion-Trion-trion散射的出色问题。我们发现非线性是不同散射通道之间竞争的结果。这种取消效应对波函数重叠敏感，并取决于材料参数。最重要的是，我们的结果表明，Trion-Polaritons之间的非线性相互作用具有吸引力，并且比激子 - 果龙相互作用强五倍。因此，我们的工作描述了Trion-Polaritons为过渡金属二核苷元单层提供有吸引力的光流体的前景。
We theoretically investigate the nonlinearity of trion-polaritons in a two-dimensional material that arises from Coulomb interaction between quasiparticles. To evaluate the interaction constant, we solve a three-body Wannier equation precisely by expanding trion wavefunctions into a Gaussian basis. Using these wavefunctions, we calculate the trion-polariton interaction energies for the exchange processes, resolving the outstanding question of trion-trion scattering. We find that the nonlinearity is the result of the competition between different scattering channels. Such a cancellation effect is sensitive to wavefunction overlaps and depends on material parameters. Most importantly, our result shows that the nonlinear interaction between trion-polaritons is attractive, and is fivefold stronger than exciton-polariton interaction. Our work thus describes the regime where trion-polaritons offer the prospects for attractive fluids of light in monolayers of transition metal dichalcogenides.
