Lead-free double perovskite materials (viz. Cs$_2$AgInCl$_6$) are being explored as stable and non-toxic alternatives of lead halide perovskites. In order to expand the optical response Cs$_2$AgInCl$_6$ in visible region, we report here stability, electronic structure properties by sublattice mixing various elements. Here, have employed %high-throughput screening using a hierarchical first-prin...

Motivated by the recent discovery of a continuous ferromagnetic quantum phase transition in CeRh$_6$Ge$_4$ and its distinction from other U-based heavy fermion metals such as UGe$_2$, we develop unified explanation their different ground state properties based on an anisotropic Kondo-Heisenberg model. We employ improved large-$N$ Schwinger boson approach predict full diagram containing both for...

For CuInP$_2$S$_6$ layered ferrielectric crystal, that is most investigated among wide family of van der Waals ferroics MM$'$P$_2$X$_6$ (M - Cu, Ag; M$'$ In, Bi, Cr, $\dots$; X S, Se), by Brillouin spectroscopy the temperature dependence longitudinal hypersound velocity was for acoustic phonons propagated in plane crystal layers. Pronounced softening phonon branch observed paraelectric phase be...

Using the theory of Lie-Hamilton systems, formal generalized time-dependent Hamiltonian systems that enlarge a recently proposed SIS epidemic model with variable infection rate are considered. It is shown that, independently on particular interpretation coefficients, these generally admit an exact solution, up to case maximal extension within classification for which superposition rule construc...

This article describes the current status of the Deep Space Network advanced systems research into ionospheric calibration techniques, based on Global Positioning System (GPS) data. A GPS-based calibration system is planned to replace the currently used Faraday rotation method by 1989. The SERIES receiver system used in this research determines the differential group delay of signals transmitte...

The character table of the fully nonrigid water cluster (cyclic forms), (H_{2}O){_i}, with C{_ih} symmetry derived for the first time, for 2<=i <=6. The group of all feasible permutations is the wreath product of groups S{_i}[S{_2}] which consists of i!2i operations for i = 2, ..., 6 divided into ( w.r.t) 5, 10, 20, 36, 65 conjugacy classes and 5, 10, 20, 36, 65 irreducible representations resp...

In this paper, we present the spin-phonon coupling and dielectric response of nano-crystalline Pr$_2$CoMnO$_6$ employing Raman spectroscopic study. is a manganite compound , it undergoes paramagnetic to ferromagnetic (PM-FM) phase transition around $T_c$ $\sim$172 K. Temperature-dependent scattering experiment carried out across study behavior in material. The results from reveal an obvious sof...

Charge and spin order is intimately related to superconductivity in copper oxide superconductors. To elucidate the competing orders various nickel compounds are crucial given fact that has been discovered Nd$_{0.8}$Sr$_{0.2}$NiO$_2$ films. Herein, we report structural, electronic transport, magnetic, thermodynamic characterizations on single crystals of La$_3$Ni$_2$O$_7$ La$_3$Ni$_2$O$_6$. meta...