Spin-1/2 Kagomé-Like Lattice in Volborthite Cu3V2O7(OH)2·2H2O

A novel cuprate Volborthite, Cu 3 V 2 O 7 (OH) 2 ·2H 2 O, containing an S -1/2 (Cu 2+ spin) kagome -like lattice is studied by magnetic susceptibility, specific heat, and 51 V NMR measurements. Sig...