Giannakeas P, Eiles Matthew T, Robicheaux F, Rost Jan M
Max-Planck-Institut für Physik komplexer Systeme, Nöthnitzer Street 38, D-01187 Dresden, Germany.
Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA.
Phys Rev Lett. 2020 Sep 18;125(12):123401. doi: 10.1103/PhysRevLett.125.123401.
We predict the existence of a universal class of ultralong-range Rydberg molecular states whose vibrational spectra form trimmed Rydberg series. A dressed ion-pair model captures the physical origin of these exotic molecules, accurately predicts their properties, and reveals features of ultralong-range Rydberg molecules and heavy Rydberg states with a surprisingly small Rydberg constant. The latter is determined by the small effective charge of the dressed anion, which outweighs the contribution of the molecule's large reduced mass. This renders these molecules the only known few-body systems to have a Rydberg constant smaller than R_{∞}/2.
我们预测存在一类通用的超长程里德堡分子态，其振动光谱形成经过修整的里德堡系列。一个缀饰离子对模型捕捉到了这些奇异分子的物理起源，准确地预测了它们的性质，并揭示了超长程里德堡分子和具有惊人小里德堡常数的重里德堡态的特征。后者由缀饰阴离子的小有效电荷决定，该电荷超过了分子大折合质量的贡献。这使得这些分子成为唯一已知的里德堡常数小于(R_{∞}/2)的少体系统。
