Unusual persistence of superconductivity against high magnetic fields in the strongly-correlated iron-chalcogenide film FeTe:Ox

• Опубліковано в: : Физика низких температур
• Дата: 2013
• Автори: Dimitrov, I.K., Si, W.D., Ku, W., Han, S.J., Jaroszynski, J.
• Формат: Стаття
• Мова: Англійська
• Опубліковано: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2013
• Теми: Сверхпроводимость, в том числе высокотемпературная
• Онлайн доступ: https://nasplib.isofts.kiev.ua/handle/123456789/118647
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Unusual persistence of superconductivity against
 high magnetic fields in the strongly-correlated
 iron-chalcogenide film FeTe:Ox / I.K. Dimitrov, W.D. Si, W. Ku, S.J. Han, J. Jaroszynski // Физика низких температур. — 2013. — Т. 39, № 8. — С. 879–884. — Бібліогр.: 35 назв. — англ.

We report an unusual persistence of superconductivity against high magnetic fields in the iron-chalcogenide
 film FeTe:Ox below ≈ 2.5 K. Instead of saturating like a mean-field behavior with a single order parameter, the
 measured low-temperature upper critical field increases progressively, suggesting a large supply of superconducting
 states accessible via magnetic field or low-energy thermal fluctuations. We demonstrate that superconducting
 states of finite momenta can be realized within the conventional theory, despite its questionable
 applicability. Our findings reveal a fundamental characteristic of superconductivity and electronic structure in
 the strongly-correlated iron-based superconductors.