Abstract
A theory of phase transitions in quasi-twodimensional systems is developed in the case of doping. We take into account the presence of “nesting” on the Fermi surface and the structure of the lattice. A self-consistent system of equations for the superconducting order parameters Δ, magnetic M and chemical potential μ is obtained. For Δ=0, M ≠ 0 we have the magnetic state of the spin density wave (SDW). With the change of the density of charge carriers x phase transition - commensurate - incommensurate SDW state occurs. Against the background of this state (for Δ ≠ 0 and M ≠ 0) superconductivity may appear, which is accompanied by magnetism. Numerical solutions for the thermodynamic quantities in magnetic and mixed phase are given.
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© 2016 Springer Science+Business Media Singapore
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Palistrant, M.E., Ursu, V.A., Palistrant, S.A. (2016). Superconductivity on the Background of the State of the Spin Density Wave in Anisotropic Systems. In: Sontea, V., Tiginyanu, I. (eds) 3rd International Conference on Nanotechnologies and Biomedical Engineering. IFMBE Proceedings, vol 55. Springer, Singapore. https://doi.org/10.1007/978-981-287-736-9_11
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DOI: https://doi.org/10.1007/978-981-287-736-9_11
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Publisher Name: Springer, Singapore
Print ISBN: 978-981-287-735-2
Online ISBN: 978-981-287-736-9
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