Distinct in-plane resistivity anisotropy in a detwinned FeTe single crystal: Evidence for a Hund's metal

Juan Jiang (姜娟), C. He (贺诚), Y. Zhang (张焱), M. Xu (徐敏), Q. Q. Ge (葛青亲), Z. R. Ye (叶子荣), F. Chen (陈飞), B. P. Xie (谢斌平), and D. L. Feng (封东来)
Phys. Rev. B 88, 115130 – Published 17 September 2013

Abstract

The in-plane resistivity anisotropy has been studied with the Montgomery method on the detwinned parent compound of the iron-based superconductor FeTe. The observed resistivity in the antiferromagnetic (AFM) direction is larger than that in the ferromagnetic (FM) direction, which is different from that observed in BaFe2As2 before. We show that the opposite resistivity anisotropy behavior in FeTe could be attributed to the strong Hund's rule coupling effects, which should be understood in a localized picture: Hund's rule coupling makes hopping along the FM direction easier than along the AFM direction in FeTe, similar to the colossal magnetoresistance observed in some manganites.

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  • Received 29 June 2013

DOI:https://doi.org/10.1103/PhysRevB.88.115130

©2013 American Physical Society

Authors & Affiliations

Juan Jiang (姜娟), C. He (贺诚), Y. Zhang (张焱), M. Xu (徐敏), Q. Q. Ge (葛青亲), Z. R. Ye (叶子荣), F. Chen (陈飞), B. P. Xie (谢斌平)*, and D. L. Feng (封东来)

  • State Key Laboratory of Surface Physics, Department of Physics, and Advanced Materials Laboratory, Fudan University, Shanghai 200433, People's Republic of China

  • *bpxie@fudan.edu.cn
  • dlfeng@fudan.edu.cn

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Issue

Vol. 88, Iss. 11 — 15 September 2013

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