论文标题
过渡金属二甲基元素单层中光诱导的拓扑超导性
Light-induced topological superconductivity in transition metal dichalcogenide monolayers
论文作者
论文摘要
单层过渡金属二分法（TMDS）与巡回电子相互作用，寄主的激子具有深层结合的激子，因此它们代表了令人兴奋的新量子多体玻色纤维纤维混合物。在这里，我们证明了与激子 - 波利孔的Bose-Einstein冷凝物（BEC）相互作用的电子可以意识到二维拓扑$ p_x+ip_y $ superconductor。使用强耦合Eliashberg理论，我们表明这是由BEC介导的吸引人的相互作用引起的，BEC介导了，该相互作用超过了电子之间的排斥性库仑相互作用。 BEC的杂化轻质性质对于实现这一目标至关重要，因为它可用于减少延迟效应并增加对配对重要的策略中介导的相互作用。我们最终展示了TMD的巨大灵活性如何使拓扑超导阶段的临界温度在实验范围内。
Monolayer transition metal dichalcogenides (TMDs) host deeply bound excitons interacting with itinerant electrons, and as such they represent an exciting new quantum many-body Bose-Fermi mixture. Here, we demonstrate that electrons interacting with a Bose-Einstein condensate (BEC) of exciton-polaritons can realise a two-dimensional topological $p_x+ip_y$ superconductor. Using strong coupling Eliashberg theory, we show that this is caused by an attractive interaction mediated by the BEC, which overcompensates the repulsive Coulomb interaction between the electrons. The hybrid light-matter nature of the BEC is crucial for achieving this, since it can be used to reduce retardation effects and increase the mediated interaction in regimes important for pairing. We finally show how the great flexibility of TMDs allows one to tune the critical temperature of the topological superconducting phase to be within experimental reach.
