Abstract
Using the two-band model, we study the interplay among orbital density wave, spin density wave and superconductivity in Fe based materials. The susceptibilities corresponding to orbital modulation and inter orbital spin density show enhanced peak at around the nesting wave vector indicating the possibility of respective density waves. It is shown that both the orbital and spin density waves are concurrent and irrespective of their zero temperature magnitudes, they have the same transition temperature. Superconductivity is studied in three scenarios – intra, inter and a mixed inter-intra orbital pairing scenarios. Inter orbital pairing is found to be dominant whereas mixed inter-intra orbital pairing scenario provides higher Tc. The S±-wave superconductivity is found to be most stable within the model.
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