Towards a realistic description of the interplay of bosonic and fermionic degrees of freedom in the physical properties of Fe pnictide in the normal and superconducting state: multiband approaches with the account of disorder effects

• Applicants: Professor Dr. Jeroen van den Brink; Stefan-Ludwig Drechsler, Ph.D.; Dr. Dmitri Efremov
• Subject Area: Theoretical Condensed Matter Physics
• Term: from 2010 to 2017
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 178217279

Fe-pnictides are of large interest due to high critical temperature of superconductive transition. We study the related rich electronic phase diagrams from a theoretical point of view, using models with realistic parameters from electron spectroscopy, neutron experiments and DFT calculations and address the role of el-el interaction, Fermi-surface nesting, el-ph coupling, and disorder. We calculate thermodynamic and transport properties of pnictides in the normal and superconducting states.

• DFG Programme: Priority Programmes
• Subproject of: SPP 1458: High Temperature Superconductivity in Iron Pnictides