Coexistence of Spin Density Wave and Superconductivity
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Date
2007-07
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Addis Ababa University
Abstract
Superconductivity and magnetism usually try to avoid each other. This feature
can be exploited to, for example, levitate a magnet above superconductor. The discovery
of magnetic materials that are also superconductors has reconciled these two
physical phenomena that were previously thought to be incompatible. The recent discovery
of compounds that are both ferromagnetic and superconducting at the same
time came as a surprise to many physicists. The mechanism of superconductivity
in these superconductors is not known. There are suggestions of spin fluctuations
as mediating superconductivity. In the present work we examine the possible coexistence
of spin density wave and superconductivity. For this we have obtained
expressions which relate the order parameters of these two states. Both singlet and
triplet superconductivity are considered. The diagrams show the variation of the order
parameters SC and SDW with temperature and also the coexistence region of
SDW and superconductivity
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Keywords
Wave and Superconductivity