Superconductivity in layered iron Selenide induced by cobalt- and sodium-doping
arXiv:0808.1784
Abstract
Superconductivity with zero resistance transition temperature (Tc) up to 8.4 K and 8.3 K can be obtained by doping cobalt and sodium in alfa-FeSe with the nominal composition of Fe0.92Co0.08Se and Na0.1FeSe, respectively. The electrical resistivity and AC magnetic susceptibility of the prepared samples, measured with physical property measurement system (PPMS), unambiguously consistent with each other to indicate that the samples are superconductive. The respective doping mechanisms for cobalt and sodium into the parent alfa-FeSe are the Fe-site substitution and the interlayer insertion. It is the first time that alfa-FeSe can be induced to be a superconductor with Na+ intercalated into the interlayers.
7 pages, 3 figures
References in corpus (10)
- Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2
- Superconductivity at 22 K in Co-doped BaFe2As2 Crystals
- Superconductivity up to 37 K in (A1-xSrx)Fe2As2 with A=K and Cs
- Pressure-induced volume-collapsed tetragonal phase of CaFe2As2 as seen via neutron scattering
- Superconductivity in Co-doped LaFeAsO
- Superconductivity in SrFe_(2-x)Co_xAs_2: Internal Doping of the Iron Arsenide Layers
- Growth and characterization of A_{1-x}K_xFe_2As_2 (A = Ba, Sr) single crystals with x=0 - 0.4
- Superconductivity in the PbO-type Structure alpha-FeSe
- Superconductivity induced by oxygen deficiency in Sr-doped LaOFeAs
- Electronic structure of LaFe1-xCoxAsO from first principle calculations