We study the van der Waals interaction between Rydberg alkali-metal atoms with fine structure (n 2 Lj; L ≤ 2) and heteronuclear alkali-metal dimers in the ground rovibrational state (X 1 Σ + ; v = 0, J = 0). We compute the associated C6 dispersion coefficients of atom-molecule pairs involving 133 Cs and 85 Rb atoms interacting with KRb, LiCs, LiRb, and RbCs molecules. The obtained dispersion coefficients can be accurately fitted to a state-dependent polynomial O(n 7 ) over the range of principal quantum numbers 40 ≤ n ≤ 150. For all atom-molecule pairs considered, Rydberg states n 2 Sj and n 2 Pj result in attractive 1/R 6 potentials. In contrast, n 2 Dj states can give rise to repulsive potentials for specific atom-molecule pairs. The interaction energy at the LeRoy distance approximately scales as n −5 for n > 40. For intermediate values of n 40, both repulsive and attractive interaction energies in the order of 10 − 100 µK can be achieved with specific atomic and molecular species. The accuracy of the reported C6 coefficients is limited by the quality of the atomic quantum defects, with relative errors ∆C6/C6 estimated to be no greater than 1% on average.
<div><div><div><p>Metal-organic frameworks (MOF) have emerged as promising tailor-design materials for developing next-generation solid-state devices with applications in linear and non-linear coherent optics. However, the implementation of functional devices is challenged by the notoriously difficult process of growing large MOF single-crystals of high optical quality. By controlling the solvo-thermal synthesis conditions, we succeed in producing large individual single crystals of the non-centrosymmetric MOF Zn(3-ptz)2 (MIRO-101) with deformed octahedron habit, and unprecedented surface areas of up to 37 mm<sup>2</sup>. We measure the polarized UV-visible absorption spectrum of individual Zn(3- ptz)2 single crystals across different lateral incidence planes. Millimeter size single crystals have band gap <i>E</i><i>g</i> = 3.32 eV, and exhibit anisotropic absorption in the band edge region near 350 nm, whereas polycrystalline samples are fully transparent in the same frequency range. Using solid-state density functional theory (DFT), the observed size dependence of the optical anisotropy is correlated with the preferred orientation adopted by freely rotating pyridyl groups under conditions of slow crystal self-assembly. Our work thus paves the way for the development of optical polarization switches based on metal-organic frameworks.</p></div></div></div>
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.