《From magnetic order to quantum disorder in the Zn-barlowite series of S = 1/2 kagome antiferromagnets》 was written by Tustain, Katherine; Ward-O′Brien, Brendan; Bert, Fabrice; Han, Tianheng; Luetkens, Hubertus; Lancaster, Tom; Huddart, Benjamin M.; Baker, Peter J.; Clark, Lucy. Electric Literature of Br2CuThis research focused onzinc barlowite antiferromagnets magnetic order quantum disorder. The article conveys some information:
We report a comprehensive muon spectroscopy study of the Zn-barlowite series of S = (1/2) kagome antiferromagnets, ZnxCu4-x(OH)6FBr, for x = 0.00 to 0.99(1). By combining muon spin relaxation and rotation measurements with state-of-the-art d.-functional theory muon-site calculations, we observe the formation of both μ-F and μ-OH complexes in Zn-barlowite. From these stopping sites, implanted muon spins reveal the suppression of long-range magnetic order into a possible quantum spin liquid state upon the increasing concentration of Zn-substitution. In the parent compound (x = 0), static long-range magnetic order below TN = 15 K manifests itself in the form of spontaneous oscillations in the time-dependent muon asymmetry signal consistent with the dipolar fields expected from the calculated muon stopping sites and the previously determined magnetic structure of barlowite. Meanwhile, in the x = 1.0 end-member of the series-in which antiferromagnetic kagome layers of Cu2+S = (1/2) moments are decoupled by diamagnetic Zn2+ ions-we observe that dynamic magnetic moment fluctuations persist down to at least 50 mK, indicative of a quantum disordered ground state. We demonstrate that this crossover from a static to dynamic magnetic ground state occurs for compositions of Zn-barlowite with x > 0.5, which bears resemblance to the dynamical behavior of the widely studied Zn-paratacamite series that contains the quantum spin liquid candidate herbertsmithite. In the experiment, the researchers used Cupric bromide(cas: 7789-45-9Electric Literature of Br2Cu)
Some reported applications of Cupric bromide(cas: 7789-45-9) are: catalyst in cross coupling reactions; co-catalyst in Sonogashira coupling; lewis acid in enantioselective addition of alkynes.Electric Literature of Br2Cu
Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”