Tuesday, June 18, 2013

1306.3740 (Yi-Zhuang You et al.)

Two-Fluid Description for Iron-Based Superconductors    [PDF]

Yi-Zhuang You, Zheng-Yu Weng
We present a two-fluid description for iron-based superconductors, which contains an itinerant electron Fermi-liquid and a local moment spin-liquid, coupled together via an effective Hund's rule interaction. We examine the low-energy collective behavior of such a system. We find that an electron-spinon composite mode emerges in the intermediate coupling regime, which may account for the hump-dip behavior observed in the resent scanning tunneling spectroscopy experiments. The superconductivity and spin-density-wave phases are consistently described within the same framework. Possible experimental test is also proposed.
View original: http://arxiv.org/abs/1306.3740

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