Details of the disorder-induced transition between s(+/-) and s(++) states in the two-band model for Fe-based superconductors

Описание

Тип публикации: статья из журнала

Год издания: 2018

Идентификатор DOI: 10.1088/1361-6668/aaa501

Ключевые слова: unconventional superconductors, iron pnictides, iron chalcogenides, impurity scattering

Аннотация: Irradiation of superconductors with different particles is one of many ways to investigate the effects of disorder. Here we study the disorder-induced transition between s(+/-) and s(++) states in the two-band model for Fe-based superconductors with nonmagnetic impurities. Specifically, we investigate the important question of whetПоказать полностьюher the superconducting gaps during the transition change smoothly or abruptly. We show that the behavior can be of either type and is controlled by the ratio of intraband to interband impurity scattering potentials, and by a parameter sigma, that represents scattering strength and ranges from zero (Born approximation) to one (unitary limit). For the pure interband scattering potential and the scattering strength sigma less than or similar to 0.11, the s(+/-) -> s(++) transition is accompanied by steep changes in the gaps, while for larger values of s, the gaps change smoothly. The behavior of the gaps is characterized by steep changes at low temperatures, T

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Издание

Журнал: SUPERCONDUCTOR SCIENCE & TECHNOLOGY

Выпуск журнала: Vol. 31, Is. 3

ISSN журнала: 09532048

Место издания: BRISTOL

Издатель: IOP PUBLISHING LTD

Авторы

  • Shestakov V.A. (RAS, Fed Res Ctr KSC SB, Kirensky Inst Phys, Krasnoyarsk 660036, Russia)
  • Korshunov M.M. (RAS, Fed Res Ctr KSC SB, Kirensky Inst Phys, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Krasnoyarsk 660041, Russia)
  • Togushova Yu N. (Siberian Fed Univ, Krasnoyarsk 660041, Russia)
  • Efremov D.V. (Leibniz Inst Festkorper & Werkstoffforsch, D-01069 Dresden, Germany)
  • Dolgov O.V. (Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany; RAS, PN Lebedev Phys Inst, Moscow 119991, Russia)

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