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Superconductivity of “1 1 1”-type iron arsenide compounds

✍ Scribed by X.C. Wang; Q.Q. Liu; L.X. Yang; Y.X. Lv; W.B. Gao; S.J. Zhang; R.C. Yu; C.Q. Jin

Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
257 KB
Volume
470
Category
Article
ISSN
0921-4534

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✦ Synopsis

a b s t r a c t ''1 1 1"-type iron arsenide compounds AFeAs (A = Li, Na) were synthesized. These compounds crystallize into Cu 2 Sb type tetragonal layered structure with space group P4/nmm and show superconductivity with the transition temperature $18 K for LiFeAs and $23 K for NaFeAs. The effect of pressure on LiFeAs sample was studied. It was found that the Tc decreased almost linearly with increasing pressure and the pressure derivative dT c /dP was about À1.38 K/GPa.

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