Effects on superconductivity

Isotope Effects on Superconductivity. Substitution of hydrogen by deuterium affects the superconducting transition temperature of palladium hydride [26929-60-2] PdH2 (54,55), palladium silver hydride, Pd Ag H D ( 6), and vanadium—2itconium—hydride, N(57). 

SYMMETRY BREAKING, NON-ADIABATIC ELECTRON-PHONON COUPLING AND NUCLEAR KINETIC EFFECT ON SUPERCONDUCTIVITY OF MgB2... 

Coupling and Nuclear Kinetic Effect on Superconductivity of MgB2... 

Woollam, J.A., Flood, D.J., Wagoner, D.E., Somoano, R. and Rembaum, A., Magnetic Field Effects on Superconductivity in Alkali Metal Intercalates of M0S2, NASA TM-X-68109, (1972). 

To elucidate the isotope effect on superconductivity, we have studied potassium-doped K3 C(jo and samples were synthesized by heating stoichiometric amounts of solvent-free C o and Cso with K metal (3 1, K Cso) in sealed quartz tubes (10" Torr) typically, 1-2 mg of was used. The temperature was ramp from 200 to 400 C over a 1-week period during the reaction. " Kj Cjo and K3 C4o samples were prepared simultaneously in the same furnace to minimize differences due to the preparative conditions. 

We will not cover the optical properties of superconducting A3C60 salts, either, both because the theoretical implications of the Jahn-Teller effect on superconductivity has been extensively discussed [32] and because experimental spectra in these compounds concentrate on electronic effects [33] and vibrational spectra have not been discussed in detail, partly because of the interference with the background of free electrons. 

To summarize, much more works, with taking various aspects into account, are needed to obtain a full understanding of the mechanism of superconductivity in sCeo. Even in the E (8> e and Tiu <8> hg model systems, setting aside the fullerides, the JT effect on superconductivity, especially in the presence of the Coulomb effect including the Hund s-rule coupling, is not known well. To some extent we shall address this issue in the model JT systems in Sect. 4 of this article. 

M. Gurvitch, H.L. Stormer, R.C. Dynes, J.M. Graybeal, and D.C. Jacobson, Field Effect on Superconducting Surface Layers of SrTi03, Extended Abstracts, Superconducting Materials, 1986 Fall Meeting of the Materials Research Society, 47 (1986). 

SUMMARY OF THE INTERNATIONAL DISCUSSION MEETING ON RADIATION EFFECTS ON SUPERCONDUCTIVITY ... 

International Discussion Meeting on Radiation Effects on Superconductivity... 

The purpose of organizing a discussion meeting on radiation effects on superconductivity was to bring researchers in the field together to actively discuss the... 

It was well known shortly after the discovery of YBCO as a high-Tc superconductor that almost any lanthanoid may be substituted for yttrium in its lattice and superconductivity is hardly affected even Tc has a variation of onlyafewkelvins. A remarkable exception is praseodymium that has a deleterious effect on superconductivity and PrBa2Cu307 a is a simple insulator. The cause of this deleterious effect has been searched for extensively. 

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