Impact of uniaxial pressure on structural and magnetic phase transitions in electron-doped iron pnictides

2015/07/31 by Xingye Lu, Kuo-Feng Tseng, T. Keller +9 · 1 citation
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paper · pdf · doi:10.1103/physrevb.93.134519

published as Phys. Rev. B 93, 134519 (2016) · 18 pages, 15 figures

arxiv created 2016/03/23 · openalex publication_date 2016/04/28 · arxiv updated 2016/05/03 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06

Abstract

We use neutron resonance spin echo and Larmor diffraction to study the effect of uniaxial pressure on the tetragonal-to-orthorhombic structural (T_s) and antiferromagnetic (AF) phase transitions in iron pnictides BaFe_2\ensuremath-xNi_xAs₂ (x=0,0.03,0.12),\phantom\rule0.16em0exSrFe_1.97Ni_0.03As₂, and BaFe₂(As_0.7P_0.3)₂. In antiferromagnetically ordered BaFe_2\ensuremath-xNi_xAs₂ and SrFe_1.97Ni_0.03As₂ with T_N and T_s (T_N\ensuremath≤T_s), a uniaxial pressure necessary to detwin the sample also increases T_N, smears out the structural transition, and induces an orthorhombic lattice distortion at all temperatures. By comparing temperature and doping dependence of the pressure induced lattice parameter changes with the elastoresistance and nematic susceptibility obtained from transport and ultrasonic measurements, we conclude that the in-plane resistivity anisotropy found in the paramagnetic state of electron underdoped iron pnictides depends sensitively on the nature of the magnetic phase transition and a strong coupling between the uniaxial pressure induced lattice distortion and electronic nematic susceptibility.

Citations

• Orbital nematic order and interplay with magnetism in the two-orbital Hubbard model
• Origin of the Resistive Anisotropy in the Electronic Nematic Phase ofBaFe2As2Revealed by Optical Spectroscopy
• Anisotropy of the In-Plane Resistivity of UnderdopedBa(Fe1−xCox)2As2Superconductors Induced by Impurity Scattering in the Antiferromagnetic Orthorhombic Phase
• Theory of electron nematic order in LaFeAsO
• Symmetry-breaking orbital anisotropy observed for detwinned Ba(Fe 1- x Co x ) 2 As 2 above the spin density wave transition
• Structural and Magnetic Phase Transitions near Optimal Superconductivity inBaFe2(As1−xPx)2
• Finite-temperature spin dynamics and phase transitions in spin-orbital models
• Character of the structural and magnetic phase transitions in the parent and electron-doped BaFe2As2compounds
• Nematic Fermi Fluids in Condensed Matter Physics

Cited by

• Nature of the antiferromagnetic and nematic transitions in Sr1−xBaxFe1.97Ni0.03As2