Computational study of model Hamiltonians for the iron-based superconductors

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Date/Time:Thursday, 21 Nov 2013 - Saturday, 23 Nov 2013
Location:PHYSICS Hall Room 3
Phone:515-294-5630
Channel:Condensed Matter Physics
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Elbio R. A. Dagotto

Department of Physics
University of Tennessee
and
Materials Science and Technology Division
Oak Ridge National Laboratory

Recent computational results in the context of models for

the iron-based superconductors will be reviewed. The importance

of including both localized and itinerant degrees of freedom

will be remarked [1,2]. Emphasis will be given to (i) recent

mean-field results that unveiled a variety of exotic magnetic

states in the phase diagrams varying the Hubbard U and Hund J

couplings, and to (ii) a large scale Monte Carlo simulation

of the nematic state above the ordering temperatures for

the parent compounds [3].



[1] P. Dai et al., Nat. Phys. 8, 709 (2012).

[2] E. Dagotto, Rev. Mod. Phys. 85 849 (2013).

[3] S. Liang et al., PRL 111, 047004 (2013); 109, 047001 (2012).