Josephson current in d-wave superconductor junctions with ferromagnetic insulator

• Опубліковано в: : Физика низких температур
• Дата: 2012
• Автори: Yan-Hua Liao, Meng Yang, Chang Ma, Yu-Bin Cao
• Формат: Стаття
• Мова: English
• Опубліковано: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2012
• Теми: Свеpхпpоводимость, в том числе высокотемпеpатуpная
• Онлайн доступ: https://nasplib.isofts.kiev.ua/handle/123456789/117182
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Josephson current in d-wave superconductor junctions with ferromagnetic insulator / Yan-Hua Liao, Meng Yang, Chang Ma, Yu-Bin Cao // Физика низких температур. — 2012. — Т. 38, № 5. — С. 474-479. — Бібліогр.: 33 назв. — англ.

We investigate the temperature dependence of the critical current and current-phase relation by taking into account the ferromagnetic scattering effect at interface in a d-wave superconductor (S)/ferromagnetic insulator layer (FI)/d-wave superconductor (S) junction. It is shown that both the barrier scattering and the roughness scattering at the interface always suppress the Andreev reflection. The Josephson critical currents depend to a great extent on the effective exchange field of the interface and the crystal orientation of the d-wave superconductor. The exchange field can lead to the change of the junction from 0 to π states and the alteration of the oscillation periods. It can also enhance the Josephson critical current in the junction under certain conditions.