Тип публикации: статья из журнала
Год издания: 2016
Идентификатор DOI: 10.1007/s10909-016-1577-x
Ключевые слова: Fe-based superconductors, Spin resonance peak, Spin-orbit coupling, Impurity scattering, Spin–orbit coupling, Approximation algorithms, High temperature superconductors, Magnetic susceptibility, Neutron scattering, Shear waves, Superconducting materials, Iron-based superconductors, Orbit coupling, Random phase approximations, Spin resonance, Spin susceptibility, Tight binding model, Resonance
Аннотация: The spin resonance peak in the iron-based superconductors is observed in inelastic neutron scattering experiments and agrees well with predicted results for the extended s-wave () gap symmetry. On the basis of four-band and three-orbital tight-binding models we study the effect of nonmagnetic disorder on the resonance peak. Spin suПоказать полностьюsceptibility is calculated in the random-phase approximation with the renormalization of the quasiparticle self-energy due to the impurity scattering in the static Born approximation. We find that the spin resonance becomes broader with the increase of disorder and its energy shifts to higher frequencies. For the same amount of disorder the spin response in the state is still distinct from that of the state.
Журнал: JOURNAL OF LOW TEMPERATURE PHYSICS
Выпуск журнала: Vol. 185, Is. 5-6
Номера страниц: 481-487
ISSN журнала: 00222291
Место издания: NEW YORK
Издатель: SPRINGER/PLENUM PUBLISHERS