Abnormal T-linear susceptibility and Phase diagram of BaFe$_{2-x}$Co$_x$As$_2$ single crystals

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dc.creatorWang, X. F.
dc.creatorWu, T.
dc.creatorWu, G.
dc.creatorLiu, R. H.
dc.creatorChen, H.
dc.creatorXie, Y. L.
dc.creatorChen, X. H.
dc.date2008-11-18
dc.date.accessioned2026-07-07T13:06:38Z
dc.date.available2026-07-07T13:06:38Z
dc.descriptionWe study systematically transport, susceptibility and heat capacity for BaFe$_{2-x}$Co$_x$As$_2$ single crystals. In the underdoped region, spin density wave (SDW) transition is observed in both resistivity and susceptibility. The magnetic susceptibility shows unusual T-linear dependence above SDW transition up to 700 K. With Co doping, SDW ordering is gradually suppressed and superconductivity emerges with a dome-like shape. Electrical transport, specific heat and magnetic susceptibility indicate that SDW and superconductivity coexist in the sample BaFe$_{2-x}$Co$_x$As$_2$ around x = 0.17, being similar with (Ba,K)Fe$_2$As$_2$. When x$>$0.34, the superconductivity completely disappears. A crossover from non-Fermi-liquid state to Fermi-liquid state is observed with increasing Co doping. A detailed electronic phase diagram about evolution from SDW to superconducting state is given.
dc.description17 pages, 8 figures
dc.identifierhttps://arxiv.org/abs/0811.2920
dc.identifierhttp://arxiv.org/abs/0811.2920
dc.identifierNew J. Phys. 11 (2009) 045003.
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/227842
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleAbnormal T-linear susceptibility and Phase diagram of BaFe$_{2-x}$Co$_x$As$_2$ single crystals
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