Plumbene, with a structure similar to graphene, is expected to possess a strong spin-orbit coupling and thus enhances its superconducting critical temperature (T c ). In this work, a buckled plumbene-Au Kagome superstructure grown by depositing Au on Pb(111) is investigated. The superconducting gap monitored by temperature-dependent scanning tunneling microscopy/spectroscopy shows that the buckled plumbene-Au Kagome superstructure not only has an enhanced T c with respect to that of a monolayer Pb but also possesses a higher value than what owned by a bulk Pb substrate. By combining angle-resolved photoemission spectroscopy with density functional theory, the monolayer Au-intercalated low-buckled plumbene sandwiched between the top Au Kagome layer and the bottom Pb(111) substrate is confirmed and the electron-phonon coupling-enhanced superconductivity is revealed. This work demonstrates that a buckled plumbene-Au Kagome superstructure can enhance superconducting T c and Rashba effect, effectively triggering the novel properties of a plumbene.
Ligand. -The new ionic salt catalyzes the double C-H activation of nitrogen-and sulfur--containing heterocyclic substrates in oxidative coupling reactions with alkynes. Indoles, thiophenes, imidazopyridines, and imidazoles are employed as substrates. In particular, intriguing imidazo[5,1,2-cd]indolizine compounds, e.g. (IV), a rare class of heterocycles, are obtained as minor products. -(GHOSH, S. K.; KUO, B.-C.; CHEN, H.-Y.; LI, J.-Y.; LIU, S.-D.; LEE*, H. M.; Eur. J. Org. Chem. 2015, 19, 4131-4142, http://dx.
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