Phase Separation and Magnetic Order in K-doped Iron Selenide Superconductor

Details Phase Separation and Magnetic Order in K-doped Iron Selenide Superconductor Phase Separation and Magnetic Order in K-doped Iron Selenide Superconductor

2011-07-30

arxiv.org/abs/1108.0069v1

Physics

Condensed Matter

Superconductivity

Scientific paper

Alkali-doped iron selenide is the latest member of high Tc superconductor family, and its peculiar characters have immediately attracted extensive attention. We prepared high-quality potassium-doped iron selenide (KxFe2-ySe2) thin films by molecular beam epitaxy and unambiguously demonstrated the existence of phase separation, which is currently under debate, in this material using scanning tunneling microscopy and spectroscopy. The stoichiometric superconducting phase KFe2Se2 contains no iron vacancies, while the insulating phase has a \surd5\times\surd5 vacancy order. The iron vacancies are shown always destructive to superconductivity in KFe2Se2. Our study on the subgap bound states induced by the iron vacancies further reveals a magnetically-related bipartite order in the superconducting phase. These findings not only solve the existing controversies in the atomic and electronic structures in KxFe2-ySe2, but also provide valuable information on understanding the superconductivity and its interplay with magnetism in iron-based superconductors.

Affiliated with

Also associated with

No associations

Rating

Phase Separation and Magnetic Order in K-doped Iron Selenide Superconductor does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Phase Separation and Magnetic Order in K-doped Iron Selenide Superconductor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phase Separation and Magnetic Order in K-doped Iron Selenide Superconductor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-136173