Thorium-doping induced superconductivity up to 56 K in Gd1-xThxFeAsO

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dc.creatorWang, Cao
dc.creatorLi, Linjun
dc.creatorChi, Shun
dc.creatorZhu, Zengwei
dc.creatorRen, Zhi
dc.creatorLi, Yuke
dc.creatorWang, Yuetao
dc.creatorLin, Xiao
dc.creatorLuo, Yongkang
dc.creatorJiang, Shuai
dc.creatorXu, Xiangfan
dc.creatorCao, Guanghan
dc.creatorXu, Zhu'an
dc.date2008-04-28
dc.date2008-06-12
dc.date.accessioned2026-07-07T10:01:34Z
dc.date.available2026-07-07T10:01:34Z
dc.descriptionFollowing the discovery of superconductivity in an iron-based arsenide LaO1-xFxFeAs with a superconducting transition temperature (Tc) of 26 K[1], Tc was pushed up surprisingly to above 40 K by either applying pressure[2] or replacing La with Sm[3], Ce[4], Nd[5] and Pr[6]. The maximum Tc has climbed to 55 K, observed in SmO1-xFxFeAs[7, 8] and SmFeAsO1-x[9]. The value of Tc was found to increase with decreasing lattice parameters in LnFeAsO1-xFx (Ln stands for the lanthanide elements) at an apparently optimal doping level. However, the F- doping in GdFeAsO is particularly difficult[10,11] due to the lattice mismatch between the Gd2O2 layers and Fe2As2 layers. Here we report observation of superconductivity with Tc as high as 56 K by the Th4+ substitution for Gd3+ in GdFeAsO. The incorporation of relatively large Th4+ ions relaxes the lattice mismatch, hence induces the high temperature superconductivity.
dc.description4 pages, 3 figures
dc.identifierhttps://arxiv.org/abs/0804.4290
dc.identifierhttp://arxiv.org/abs/0804.4290
dc.identifierEurophysics Letters 83, 67006 (2008).
dc.identifierdoi:10.1209/0295-5075/83/67006
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/168672
dc.subjectSuperconductivity
dc.titleThorium-doping induced superconductivity up to 56 K in Gd1-xThxFeAsO
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