Dichotomy between large local and small ordered magnetic moments in iron-based superconductors.
Phys Rev Lett
; 104(19): 197002, 2010 May 14.
Article
in En
| MEDLINE
| ID: mdl-20866992
ABSTRACT
We study a four-band model for iron-based superconductors within the local density approximation combined with dynamical mean-field theory (LDA+DMFT). This successfully reproduces the results of models which take As p degrees of freedom explicitly into account and has several physical advantages over the standard five d-band model. Our findings reveal that the new superconductors are more strongly correlated than their single-particle properties suggest. Two-particle correlation functions unveil the dichotomy between local and ordered magnetic moments in these systems, calling for further experiments to better resolve the short time scale spin dynamics.
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Collection:
01-internacional
Database:
MEDLINE
Type of study:
Prognostic_studies
Language:
En
Journal:
Phys Rev Lett
Year:
2010
Type:
Article
Affiliation country:
Austria