University of Minnesota
School of Physics & Astronomy

Physics and Astronomy Calendar

Tuesday, April 21st 2015
4:30 pm:
CM Journal Club in 236A Tate
Speaker: Jiashen Cai
Subject: Superconductivity and spin density wave correlations in multiband metals

The coexistence of different ordered electronic states in metals has been discussed a lot. In iron pnictides, superconducting and magnetic spin density wave orders influence each other, e.g. they can support each other and lead to coexistence states [1]. This coexistence depends on the shape and area of the Fermi surface. In my presentation, I will briefly review the concepts of Fermi surface nesting and spin density waves. Then, a Ginzburg-Landau analysis in the vicinity of the crossing point of SC and SDW transitions and at T=0 will be discussed [2]. After that, I will present some numerical results and compare with the Ginzburg-Landau theory.
[1]Chubukov, Andrey V., D. V. Efremov, and Ilya Eremin. "Magnetism, superconductivity, and pairing symmetry in iron-based superconductors."Physical Review B 78.13 (2008): 134512.
[2] Vorontsov, A. B., M. G. Vavilov, and A. V. Chubukov, Physical Review B 81.17 (2010): 174538.

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