59-Co and 75-As NMR Investigation of Electron-Doped High Tc Superconductor BaFe(1.8)Co(0.2)As(2) (Tc = 22K)

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dc.creatorNing, F. L.
dc.creatorAhilan, K.
dc.creatorImai, T.
dc.creatorSefat, A. S.
dc.creatorJin, R.
dc.creatorMcGuire, M. A.
dc.creatorSales, B. C.
dc.creatorMandrus, D.
dc.date2008-08-10
dc.date2008-08-18
dc.date.accessioned2026-07-07T10:06:58Z
dc.date.available2026-07-07T10:06:58Z
dc.descriptionWe report an NMR investigation of the superconductivity in BaFe(2)As(2) induced by Co doping (Tc=22K). We demonstrate that Co atoms form an alloy with Fe atoms and donate carriers without creating localized moments. Our finding strongly suggests that the underlying physics of iron-pnictide superconductors is quite different from the widely accepted physical picture of high Tc cuprates as doped Mott insulators. We also show a crossover of electronic properties into a low temperature pseudo-gap phase with a pseudo-gap Delta 560K, where chi(spin) constant and resisitivty T. The NMR Knight shift below Tc decreases for both along the c-axis and ab-plane, and is consistent with the singlet pairing scenario.
dc.descriptionAccepted for publication in J. Phys. Soc. Jpn. (4 pages)
dc.identifierhttps://arxiv.org/abs/0808.1420
dc.identifierhttp://arxiv.org/abs/0808.1420
dc.identifierJ. Phys. Soc. Jpn. 77 (2008) 103705
dc.identifierdoi:10.1143/JPSJ.77.103705
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/170477
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.title59-Co and 75-As NMR Investigation of Electron-Doped High Tc Superconductor BaFe(1.8)Co(0.2)As(2) (Tc = 22K)
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