Publication Date:
2011-05-25
Description:
Author(s): Andrew Nicholson, Weihao Ge, Xiaotian Zhang, José Riera, Maria Daghofer, Andrzej M. Oleś, George B. Martins, Adriana Moreo, and Elbio Dagotto We introduce and study an extended “ t - U - J ” two-orbital model for the pnictides that includes Heisenberg terms deduced from the strong coupling expansion. Including these J terms explicitly allows us to enhance the strength of the ( π ,0)-(0, π ) spin order which favors the presence of tightly bound pair... [Phys. Rev. Lett. 106, 217002] Published Tue May 24, 2011
Keywords:
Condensed Matter: Electronic Properties, etc.
Print ISSN:
0031-9007
Electronic ISSN:
1079-7114
Topics:
Physics
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