Сибирский федеральный университет

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 susceptibility 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

• Togushova Y.N. (Siberian Federal University)
• Shestakov V.A. (Siberian Federal University)
• Korshunov M.M. (L.V. Kirensky Institute of Physics)

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