Orbital coupling and superconductivity in the iron pnictides
| Title | Orbital coupling and superconductivity in the iron pnictides |
| Publication Type | Journal Article |
| Year of Publication | 2009 |
| Authors | Zhang JH, Sknepnek R, Fernandes RM, Schmalian J |
| Journal Title | Physical Review B |
| Volume | 79 |
| Pages | 220502 |
| Date Published | 06/01 |
| ISBN Number | 1098-0121 |
| Accession Number | ISI:000267699300010 |
| Keywords | 2-dimensional hubbard-model, antiferromagnetism, fermi surface, fluctuations, iron compounds, scf calculations, superconducting materials, surface states, systems |
| Abstract | We demonstrate that strong interorbital interaction is very efficient to achieve superconductivity due to magnetic fluctuations in the iron pnictides. Fermi-surface states that are coupled by the antiferromagnetic wave vector are often of different orbital nature, causing pair-hopping interactions between distinct Fe-3d orbitals to become important. Performing a self-consistent fluctuation exchange calculation below T-c we determine the superconducting order parameter as function of intra- and interorbital couplings. We find an s(+/-)-pairing state with T-c similar or equal to 80 K for realistic parameters. |
| URL | <Go to ISI>://000267699300010 |
| DOI | 10.1103/Physrevb.79.220502 |
