Sign-reversal of the in-plane resistivity anisotropy in hole-doped iron pnictides

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	Sign-reversal of the in-plane resistivity anisotropy in hole-doped iron pnictides
	Blomberg, EC ; Tanatar, MA ; Fernandes, RM ; Mazin, II ; Shen, B ; Wen, HH ; Johannes, MD ; Schmalian, J ; Prozorov, R
刊名	NATURE COMMUNICATIONS
	2013
卷号	4
ISSN号	2041-1723
通讯作者	Prozorov, R (reprint author), Ames Lab, Ames, IA 50011 USA.
中文摘要	Unconventional superconductivity usually originates from several strongly coupled degrees of freedom, such as magnetic, charge and elastic. A highly anisotropic electronic phase, not driven by lattice degrees of freedom, has been proposed in some of these superconductors, from cuprates to iron-based compounds. In the iron pnictide BaFe2As2, this nematic phase arises in the paramagnetic phase and is present for wide doping and temperature ranges. Here we probe the in-plane electronic anisotropy of electron-and hole-doped BaFe2As2 compounds. Unlike other materials, the resistivity anisotropy behaves very differently for electron- and hole-type dopants and even changes sign on the hole-doped side. This behaviour is explained by Fermi surface reconstruction in the magnetic phase and spin-fluctuation scattering in the paramagnetic phase. This unique transport anisotropy unveils the primary role played by magnetic scattering, demonstrating the close connection between magnetism, nematicity and unconventional superconductivity.
资助信息	US Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering [DE-AC02-07CH11358]; NSF of China; Ministry of Science and Technology of China [2011CBA00102, 2012CB821403]; NSF Partnerships for International Research and Education (PIRE) programme [OISE-0968226]
语种	英语
公开日期	2014-01-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/57440]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Blomberg, EC,Tanatar, MA,Fernandes, RM,et al. Sign-reversal of the in-plane resistivity anisotropy in hole-doped iron pnictides[J]. NATURE COMMUNICATIONS,2013,4.
APA	Blomberg, EC.,Tanatar, MA.,Fernandes, RM.,Mazin, II.,Shen, B.,...&Prozorov, R.(2013).Sign-reversal of the in-plane resistivity anisotropy in hole-doped iron pnictides.NATURE COMMUNICATIONS,4.
MLA	Blomberg, EC,et al."Sign-reversal of the in-plane resistivity anisotropy in hole-doped iron pnictides".NATURE COMMUNICATIONS 4(2013).