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RPA Analysis of a Two-orbital Model for the BiS2-based Superconductors
George Martins, Adriana Moreo, Elbio Dagotto
The random-phase approximation (RPA) is here applied to a two-orbital model for the BiS2-based superconductors that was recently proposed by Usui et al., arXiv:1207.3888. Varying t…
Magnetic and Orbital Order in (MnO)/(MnO) Superlattices Studied via a Double-Exchange Model with Strain
Shuai Dong, Qinfang Zhang, Seiji Yunoki +2
The two-orbital double-exchange model is employed for the study of the magnetic and orbital orders in (MnO)/(MnO) (: rare earths; : alkaline earths)…
The Unexpected Properties of Alkali Metal Iron Selenide Superconductors
Elbio Dagotto
The iron-based superconductors that contain FeAs layers as the fundamental building block in the crystal structures have been rationalized in the past using ideas based on the Ferm…
Magnetism and its microscopic origin in iron-based high-temperature superconductors
Pengcheng Dai, Jiangping Hu, Elbio Dagotto
High-temperature superconductivity in the iron-based materials emerges from, or sometimes coexists with, their metallic or insulating parent compound states. This is surprising sin…
Dynamics of doublon-holon pairs in Hubbard two-leg ladders
Luis G. G. V. Dias da Silva, Gonzalo Alvarez, Elbio Dagotto
The dynamics of holon-doublon pairs is studied in Hubbard two-leg ladders using the time-dependent Density Matrix Renormalization Group method. We find that the geometry of the two…
Magnetic States of the Two-Leg Ladder Alkali Metal Iron Selenides FeSe
Qinlong Luo, Andrew Nicholson, Julián Rincón +8
Recent neutron scattering experiments addressing the magnetic state of the two-leg ladder selenide compound BaFeSe have unveiled a dominant spin arrangement involving ferro…