Transport properties and superconductivity in K$_{1-x}$Ln$_{x}$Fe$_2$As$_2$ (Ln=Sm, Nd and La) system

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dc.creatorLiu, R. H.
dc.creatorWu, G.
dc.creatorChen, H.
dc.creatorXie, Y. L.
dc.creatorYan, Y. J.
dc.creatorWu, T.
dc.creatorWang, X. F.
dc.creatorYing, J. J.
dc.creatorLi, Q. J.
dc.creatorShi, B. C.
dc.creatorChen, X. H.
dc.date2008-11-16
dc.date.accessioned2026-07-07T10:18:44Z
dc.date.available2026-07-07T10:18:44Z
dc.descriptionWe prepared the samples K$_{1-x}$Ln$_{x}$Fe$_2$As$_2$ (Ln=Sm, Nd and La) with ThCr$_2$Si$_2$-type structure. These samples were characterized by X-ray diffraction, resistivity, susceptibility and thermoelectric power (TEP). Substitution of Ln (Ln=La, Nd and Sm) for K in K$_{1-x}$Ln$_{x}$Fe$_2$As$_2$ system raises the superconducting transition temperature to 34-36 K. The TEP measurements indicate that the TEP of K$_{1-x}$Ln$_{x}$Fe$_2$As$_2$ is positive, being similar to the case of the Ba$_{1-x}$K$_{x}$Fe$_2$As$_2$ system with p-type carrier. In the K$_{1-x}$Ln$_{x}$Fe$_2$As$_2$ system, the superconducting $KFe_2As_2$ with $T_c\sim 3$ K is the parent compound, and no structural and spin-density wave instabilities exist in this system.
dc.description4 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/0811.2569
dc.identifierhttp://arxiv.org/abs/0811.2569
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/174291
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleTransport properties and superconductivity in K$_{1-x}$Ln$_{x}$Fe$_2$As$_2$ (Ln=Sm, Nd and La) system
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