Study of superconductivity in layered iron-based materials was initiated in 2006 by Hosono's
group, and boosted in 2008 by the superconducting transition temperature, Tc, of 26 K in …

Magnons in antiferromagnetic insulators couple strongly to conduction electrons in adjacent
metals. We show that this interfacial tie can lead to superconductivity in a trilayer consisting …

We study spin-half fermions in a one-dimensional extended Hubbard chain at low filling. We
identify three triplet and one singlet pairing channels in the system, which are independently …

We investigate the evolution of magnetic properties as a function of hydrogen doping in the
iron-based superconductor LaFeAsO 1− x H x using dynamical mean-field theory combined …

Some of the iron pnictides show coexisting superconductivity and spin-density-wave order.
We study the superconducting pairing instability in the spin-density-wave phase. Assuming …

Iron base superconductor have gained much attention in the research community. They offer
great potentials to improve our understanding of the subject of superconductivity by having …

Recently discovered advanced materials, such as heavy fermions, frequently exhibit a rich
phase diagram suggesting the presence of different competing interactions. A unified …

Transition metal substitutions of BaFe 2 As 2 have been characterized by structural and
magnetic measurements. Particular focus has been paid to magnetic ordering, SDW …

We report the results we obtained regarding the use of the Josephson effect to probe the
symmetry of the superconducting order parameter of Co-doped Ba (FeAs) 2 crystals …

In this thesis, we propose that a ferro-orbital order, which breaks the degeneracy between
the Fe d xz and d yz orbitals, is the effective cause of the structural and the magnetic …