The expanding range of optoelectronic applications lead-halide perovskites requires their production in diverse forms (single crystals, thin- and thick-films or even nanocrystals), motivating the development materials processing deposition routes that are specifically suited for these structurally soft, low-melting semiconductors. Pressure-assisted compact pellets gaining popularity, necessitat...

In order to evaluate an atomic clock, it is important to determine the main frequency shifts caused by external fields, device imperfections, etc. Scanning the frequency of the main oscillator, the Ramsey fringe is obtained and used to determine the main shifts. The gravitational shift (10−17), second order Doppler (1.65×10−13), Black-Body radiation shift (2.9×10−14), quadratic Zeeman effect (5...

Recently, competing electronic instabilities, including superconductivity and density-wave-like order, have been discovered in vanadium-based kagome metals AV3Sb5 (A = K, Rb, Cs) with a nontrivial band topology. This finding stimulates considerable interest to study the interplay of these orders possible exotic excitations superconducting state. Here, we performed 51V 133Cs nuclear magnetic res...

Optical frequencies of the hyperfine components of the Dzline in 133CS are determined using high-resolution spectroscopy and a ferntosecond laser frequency comb. A narrow-linewidth probe laser excites the 6s 281/2 (F=3, 4).----+ 6p 2p 3/2 (F=2,3, 4, 5) transition in a highly collimated atomic beam. Fluorescence spectra are taken by scanning the laser frequency over the excited-state hyperfine s...

Cesium is the heaviest stable alkali metal (with only one isotope – 133Cs) and it occurs mainly as a potassium-substituting cation. It an important trace element in rocks typical for Earth crust, its content biomass also relatively high compared to those abiogenic elements which are little soluble. Low-cost analytical methods like X-Ray Fluorescence inadequate quantify cesium natural samples, s...