Tunneling spectroscopy into YBa2Cu4O8: Intralayer and interlayer analysis.
Phys Rev B Condens Matter 50:14 (1994) 10397-10400
Structural effects of hydrostatic pressure in orthorhombic La2-xSrxCuO4.
Phys Rev B Condens Matter 50:5 (1994) 3221-3229
Synthesis and properties of a cuprate superconductor containing double mercury-oxygen layers.
Science 265:5170 (1994) 380-383
Abstract:
A cuprate superconductor containing double mercury layers was synthesized with a high-pressure, high-temperature technique. The compound, with chemical formula Hg(2)Ba(2)-Y1-xCaxCu(2)O(8-delta), contains a double HgO layer with structure similar to that of rock salt. The prototype compound Hg(2)Ba(2)YCu(2)O(8-delta) is an insulator. Superconductivity is induced in the system by partially replacing yttrium with calcium.Low-energy spin fluctuations in YBa2 Cu3 O6.1 and ErBa2 Cu3 O6+x A Cu (1) T1 NQR study
Physica C: Superconductivity and its applications 226:3-4 (1994) 301-310
Abstract:
63Cu(1) NQR signals and their relaxation have been measured in YBa2Cu3O6.1 and ErBa2Cu3O6+x at temperatures between 10 K and 300 K. In YBa2Cu3O6.1 a peak is observed in the spin-lattice relaxation, T1-1, around 140 K. An explanation in terms of doped-hole motion is presented and alternative O(4)-O(5) diffusion mechanisms are critically discussed. In ErBa2Cu3O6+x the low-temparature T1-1 is dominated by magnetic fluctuations of Er; quantitative agreement is found when the correct ground state and magnetic dynamic properties of the rare earth are taken into account. © 1994.Evidence of apical oxygen in Nd2CuOy determined by single-crystal neutron diffraction.
Phys Rev B Condens Matter 49:21 (1994) 15322-15326