Тип публикации: научное издание
Год издания: 2018
Ключевые слова: Fe-based superconductors, Spin fluctuations, Spin resonance peak, Unconventional superconductivity
Аннотация: In multiband systems, it is possible to explore a variety of competing ground states. Bright examples are the Fe-based pnictides and chalcogenides, which demonstrate metallic, superconducting, and various magnetic phases. Here I discuss only one of the many interesting topics, namely, spin fluctuations in metallic multiband systemsПоказать полностью. I show how to calculate the effect of itinerant spin excitations on the electronic properties and formulate a theory of spin fluctuation-induced superconductivity. The superconducting state is unconventional and thus the system demonstrates unusual spin response with the spin resonance feature. I discuss its origin, consequences, and relation to experimental observations. Role of the spin-orbit coupling is specifically emphasized.
Журнал: Perturbation Theory: Advances in Research and Applications
Номера страниц: 61-137
Издатель: Nova Science Publishers, Inc.