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19 April 2024 |
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Observation of superconductivity at 30 K~46 K in AxFe2Se2 (A = Li, Na, Ba, Sr, Ca, Yb, and Eu) | | T. P. Ying
; X. L. Chen
; G. Wang
; S. F. Jin
; T. T. Zhou
; X. F. Lai
; H. Zhang
; W. Y. Wang
; | | Date: |
20 Feb 2012 | | Abstract: | New iron selenide superconductors by intercalating smaller-sized alkali
metals (Li, Na) and alkaline earths using high-temperature routes have been
pursued ever since the discovery of superconductivity at about 30 K in (K, Rb,
or Cs)Fe2Se2, but all have failed so far. Here we demonstrate that a series of
superconductors with enhanced Tc = 30~46 K can be obtained by intercalating
metals, Li, Na, Ba, Sr, Ca, Yb, and Eu in between FeSe layers by the liquid
ammonia method at room temperature. The findings provide a new starting point
for studying the properties of these superconductors and an effective synthetic
route for the exploration of new superconductors as well. | | Source: | arXiv, 1202.4340 | | Services: | Forum | Review | PDF | Favorites | |
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