Superconductivity at 22 K in Co-doped BaFe2As2 crystals.
By A. Sefat, R. Jin, M. McGuire, B. Sales, David J. Singh, D. Mandrus. Physical Review Letters, 2008
720 citations recorded by the source corpus.
Here we report bulk superconductivity in BaFe1.8Co0.2As2 single crystals below Tc=22 K, as demonstrated by resistivity, magnetic susceptibility, and specific heat data. Hall data indicate that the dominant carriers are electrons, as expected from simple chemical reasoning. This is the first example of superconductivity induced by electron doping in this family of materials. In contrast with cuprates, the BaFe2As2 system appears to tolerate considerable disorder in the FeAs planes. First principles calculations for BaFe1.8Co0.2As2 indicate the interband scattering due to Co is weak.
Subfields: Accounting, Electronic, Optical and Magnetic Materials, Strategy and Management
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In Accounting
In Electronic, Optical and Magnetic Materials
- Ruslan Prozorov
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Citations in the corpus
- London penetration depth in iron-based superconductors (2011, background): “Among these, perhaps the most diverse family is based on (AE)Fe2As2 parent compounds (where AE=alkaline earth, denoted as the ‘122’ system) in which electron [8–11], hole [12, 13] and isovalent [14, 15] dopants induce a superconductivity ‘dome’ with maximum Tc achieved at fairly”
- Satellites and large doping and temperature dependence of electronic properties in hole-doped BaFe2As2 (2011, background): “The Hubbard U interactions for 15 the Fe-d orbitals are defined as matrix elements of Wr in the maximally localized Wannier function (MLWF) [4, 5] basis for the Fe-d orbitals.”
- Superconductivity in iron compounds (2011, background): “In electron doped LnFe1 xCoxAsO, Sefat et al. (2008a) were the first to discover that, unlike the high Tc cuprate CuO planes, the superconducting FeAs planes can tolerate significant disorder (this is also the case for the 122 structure, discussed in Sec.”
- Normal-state spin dynamics and temperature-dependent spin-resonance energy in optimally doped BaFe 1.85 Co 0.15 As 2 (2009, background): “The recently discovered iron arsenide superconductors [22, 23] are characterized by AFM correlations throughout the phase diagram, often coexisting with superconductivity deep into the superconducting dome [2].”