Electronic Nematicity Revealed by Torque Magnetometry in Iron Arsenide EuFe$_2$(As$_{1-x}$P$_x$)$_2$

Xiaofeng Xu; W. H. Jiao; N. Zhou; Y. K. Li; B. Chen; C. Cao; Jianhui Dai; A. F. Bangura; Guanghan Cao

doi:10.1103/PhysRevB.89.104517

paper

Electronic Nematicity Revealed by Torque Magnetometry in Iron Arsenide EuFe $_{2}$ (As $_{1 - x}$ P $_{x}$ ) $_{2}$

arXiv:1402.4124 · doi:10.1103/PhysRevB.89.104517

Abstract

Electronic nematics, an electron orientational order which breaks the underlying rotational symmetry, have been observed in iron pnictide superconductors several years after their discovery. However, the universality of the doping dependence of this phase and its relation to other symmetry-breaking orders (such as superconductivity) in distinct families of iron pnictides, remain outstanding questions. Here we use torque magnetometry as a probe to study the rotational symmetry breaking in EuFe $_{2}$ (As $_{1 - x}$ P $_{x}$ ) $_{2}$ without introducing external pressure. The nematic phase is found to proliferate well above the structural transition and to persist into the superconducting regime at optimal doping, after which it becomes absent or very weak, in sharp contrast to the behaviour observed in BaFe $_{2}$ (As $_{1 - x}$ P $_{x}$ ) $_{2}$ . These measurements suggest a putative quantum nematic transition near optimal doping under the superconducting dome.

5 pages, 3 figures. For the supplementary materials and high-resolution figures, please contact [email protected]

Electronic Nematicity Revealed by Torque Magnetometry in Iron Arsenide EuFe $_{2}$ (As $_{1 - x}$ P $_{x}$ ) $_{2}$

Abstract

References in corpus (15)

Cited by in corpus (8)

Electronic Nematicity Revealed by Torque Magnetometry in Iron Arsenide EuFe2​(As1−x​Px​)2​

Abstract

References in corpus (15)

Cited by in corpus (8)

Electronic Nematicity Revealed by Torque Magnetometry in Iron Arsenide EuFe $_{2}$ (As $_{1 - x}$ P $_{x}$ ) $_{2}$