Physics – Condensed Matter – Superconductivity
Scientific paper
2011-09-16
Phys. Rev. B 84, 094526 (2011)
Physics
Condensed Matter
Superconductivity
To appear in Phys. Rev. B
Scientific paper
The influence of incommensurate spin density waves (SDW) on superconductivity in unconventional superconductors is studied by means of the Bogolubov-de Gennes (BdG) equations. Exploiting translational symmetries of a magnetically ordered two-dimensional system we propose an approach that allows to solve the BdG equations on much larger clusters than it is usually possible for inhomogeneous systems. Applying this approach we demonstrate that the presence of incommensurate spin density waves induces real-space inhomogeneity of the superconducting order parameter even in the absence of external magnetic field. In this case a homogeneous order parameter of the Bardeen-Cooper-Schrieffer-type superconducting state is slightly modulated, or equivalently, a small fraction of the charge carriers form Cooper pairs with non-zero total momentum. However, when a sufficiently strong magnetic field is applied, the homogeneous component of the order parameter is suppressed and the system transits to the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state, where the order parameter oscillates changing sign. We show that for s-wave pairing the presence of external magnetic field diminishes the destructive influence of the SDW order on superconductivity. A simple explanation of this effect is also proposed.
Maska Maciej M.
Mierzejewski Marcin
Ptok Andrzej
No associations
LandOfFree
Coexistence of superconductivity and incommensurate magnetic order does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Coexistence of superconductivity and incommensurate magnetic order, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coexistence of superconductivity and incommensurate magnetic order will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-534463