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cond-mat.supr-con2002
Unconventional Superconductivity in MgCNi3
Klaus Voelker, Manfred Sigrist
A multiband superconductor with a conventional phonon mechanism can develop an unconventional state with a nontrivial order parameter phase relation between the individual bands. W…
cond-mat.supr-con1999
Dissipation-Driven Breakdown of Universality in Two-Dimensional Superconductors
Klaus Voelker
The influence of gapless dissipative degrees of freedom on the superconductor-insulator transition in two dimensions is investigated. We develop a series expansion for the free ene…