Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2.

By M. Rotter, M. Tegel, D. Johrendt. Physical Review Letters, 2008

2,032 citations recorded by the source corpus.

The ternary iron arsenide BaFe2As2 becomes superconducting by hole doping, which was achieved by partial substitution of the barium site with potassium. We have discovered bulk superconductivity at T{c}=38 K in (Ba1-xKx)Fe2As2 with x approximately 0.4. The parent compound BaFe2As2 crystallizes in the tetragonal ThCr2Si2-type structure, which consists of (FeAs);{delta-} iron arsenide layers separated by Ba2+ ions. BaFe2As2 is a poor metal and exhibits a spin density wave anomaly at 140 K. By substituting Ba2+ for K+ ions we have introduced holes in the (FeAs);{-} layers, which suppress the anomaly and induce superconductivity. The T{c} of 38 K in (Ba0.6K0.4)Fe2As2 is the highest in hole doped iron arsenide superconductors so far. Therefore, we were able to expand this class of superconductors by oxygen-free compounds with the ThCr2Si2-type structure.

Subfields: Condensed Matter Physics, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/aa5a467f0cc8ea59dfa998ee6902867e143ff911

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Condensed Matter Physics

1. E. Dagotto
2. P. Dai
3. D. Feng
4. Philipp Werner
5. A. Millis
6. Xianhui Chen
7. Fu-Chun Zhang
8. Tao Xiang

In Electronic, Optical and Magnetic Materials

1. E. Dagotto
2. P. Dai
3. G. Stewart
4. D. Feng
5. Xianhui Chen
6. Fu-Chun Zhang
7. Tao Xiang
8. Philipp Werner

Citations in the corpus

• Superconductivity in iron compounds (2011, background): “In addition to doping-induced superconductivity, three Fe-containing 122 compounds superconduct without doping, KFe2As2 (Tc 3:8 K, Rotter et al., 2008a), RbFe2As2 (Tc 2:6 K, Bukowski et al., 2010), and CsFe2As2 (Tc ¼ 2:6 K, Sasmal et al. (2008).”