Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 6 of 6 for “"iron pnictides"”.
-
Thermal expansion and magnetostriction studies on iron pnictides
… and magnetostriction of novel superconducting iron pinictides and related materials. In particular, \re~with R\,=\,La, Ce, Pr, Sm, Gd, \laf~and Ca(Fe$_{1-x}$Co$_x$)$_2$As$_2$ have been investigated. The data on polycrystalline \laf~are the first published thermal expansion data on this …
-
Power-law liquid in high-temperature superconductors
… we study the local-itinerant dichotomy in iron pnictides. We show that an interplay between localized moments and itinerant electrons is needed to reproduce the spin excitations observed in inelastic neutron scattering experiments. These results further our understanding of the degrees of …
-
DISORDER EFFECTS IN FRUSTRATED MAGNETS AND ABSORBING STATE TRANSITIONS
… observed e.g. in cuprate superconductors and iron pnictides. To understand the effects of disorder on such phases, we have investigated the behavior of the diluted J<sub>1</sub>-J<sub>2</sub> Ising model. Spinless impurities generate a random-field disorder for the spin-density (stripe) order …
-
Non-perturbative approaches to strongly correlated electron systems
… in the point contact spectroscopy signal on iron pnictides. Chapters 3, 4 and 5 discuss the applications of the AdS/CFT correspondence to model various condensed matter systems. In chapter 3, We consider an interaction term between a bulk spinor field and a gauge field in the …
-
High-temperature superconductivity in a family of iron pnictide materials
… to create high-quality samples of various Iron Pnictide superconductors, to dope them with various chemicals and to characterise the resulting crystalline samples. I discuss in depth the signature of good quality crystals and the various experiments that they have been used in by myself and …
-
Orbital order in iron-based superconductors
… structural and the magnetic transitions in the iron-based superconductors. We will discuss this orbital order in the framework of the local-itinerant dichotomy. First, due to the spatial anisotropy of the occupied orbitals that form the local moments, the magnetic exchange constants acquire …