45 citations · 72 across the 8 of their papers we have counts for
8 papers
Crystal Growth of Cu6(Ge,Si)6O18.6H2O and Assignment of UV-VIS Spectra in Comparison to Dehydrated Dioptase and Selected Cu(II) Oxo-Compounds Including Cuprates
Hans Hermann Otto
It is reported on growth of mm-sized single-crystals of the low-dimensional S = 1/2 spin compound Cu6(Ge,Si)6O18.6H2O by a diffusion technique in aqueous solution. A route to form…
High-Tc Superconductivity: Strong Indication of Filamentary-Chaotic Conductance and Possible Routes to Superconductivity Above Room Temperature
Hans Hermann Otto
The empirical relation of T_co(K)=2740/<q>_c^4 between the transition temperature of optimum doped superconductors T_co and the mean cationic charge <q>_c, a physical paradox, can…
Perovskite Twin Solar Device with Estimated 50% Bifacial PCE Potential and New Solar Material Options
Hans Hermann Otto
There are recent investigations regarding tandem solar cells with a top perovskite cell and a bottom silicon one with a potential of > 25% power conversion efficiency. Because of s…
Vibrational spectra of copper polysilicate, CuSiO3
Marco Meibohm, Hans Hermann Otto, Wolfgang Brockner
This is a representation of the first Raman and IR / FIR spectra for orthorhombic copper polysilicate, CuSiO3, measured at room temperature on polycrystalline samples and a compari…
Family tree of perovskite-related superconductors
Hans Hermann Otto
A simple empirical relation has been found to exist between optimum Tc and the formal mean cation charge <qc> of perovskite-related superconductors, covering both conventional supe…
Quantum phase transition in the dioptase magnetic lattice
C. Gros, P. Lemmens, K. -Y. Choi +3
The study of quantum phase transitions, which are zero-temperature phase transitions between distinct states of matter, is of current interest in research since it allows for a des…