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Coexistence of Spin Density Wave (SDW) and Superconductivity in Ba<sub>1-x</sub>K<sub>x</sub>Fe<sub>2</sub>As<sub>2</sub>
Department of Physics, Haramaya University, Diredawa, Ethiopia
- 1 Department of Physics, Haramaya University, Diredawa, Ethiopia
World Journal of Condensed Matter Physics·Volume 05 (2015)·Pages 319–331·Published 12 October 2015·DOI10.4236/wjcmp.2015.54032
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Abstract
With the use of a model Hamiltonian and retarded double time green’s function formalism, we obtain mathematical expressions for spin density wave and superconductivity parameters. The model reveals a distinct possibility of the coexistence of magnetic phase and superconductivity, which are two usually irreconcilable cooperative phenomena. The work is motivated by the recent experimental evidences of coexistence of spin density wave and superconductivity in a number of FeAs-based superconductors. The theoretical results are then applied to show the coexistence of spin density wave and superconductivity in iron pnictide compound Ba 1-x K x Fe 2 As 2 (0.2 ≤ x < 0.4).
KeywordsRetarded Double Time Green’s Function FormalismSpin Singlet and Triplet StateSpin Density Wave and Superconducting
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