Evidence for an electron nematic phase transition in underdoped iron pnictide superconductors

Abstract

Electrical resistivity measurements of detwinned single crystals of the representative iron arsenide Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$ reveal a dramatic in-plane anisotropy associated with the tetragonal-to-orthorhombic structural transition that precedes the onset of long-range antiferromagnetic order. These results indicate that the structural transition in this family of compounds is fundamentally electronic in origin.

5 pages, 4 figures

References in corpus (13)

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• Spin density wave anomaly at 140 K in the ternary iron arsenide BaFe2As2
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• First-order magnetic and structural phase transitions in Fe${}_{1+y}$Se${}_x$Te${}_{1-x}$
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• The Unprecedented Giant Coupling of Fe-spin State and the As-As Hybridization in Iron-Pnictide
• A neutron scattering study of the interplay between structure and magnetism in Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Quantum oscillations in the parent magnetic phase of an iron arsenide high temperature superconductor
• Quantum oscillations in the parent pnictide BaFe${}_2$As${}_2$ : itinerant electrons in the reconstructed state

Cited by in corpus (16)

• Quantum Criticality
• Magnetism and Charge Dynamics in Iron Pnictides
• Orbital Order and Spontaneous Orthorhombicity in Iron Pnictides
• Unprecedented anisotropic metallic state in BaFe2As2 revealed by optical spectroscopy
• Symmetry of spin excitation spectra in the tetragonal paramagnetic and superconducting phases of 122-ferropnictides
• Orbital Fluctuation Theory in Iron Pnictides: Effects of As-Fe-As Bond Angle, Isotope Substitution, and $Z^2$-Orbital Pocket on the Superconductivity
• Itinerant Spin Excitations in SrFe2As2 Measured by Inelastic Neutron Scattering
• Conductivity anisotropy in the antiferromagnetic state of iron pnictides
• Theory of Valley-Density Wave and Hidden Order in Iron-Pnictides
• Symmetry-breaking lattice distortion in Sr_3Ru_2O_7
• Phonon splitting and anomalous enhancement of infrared-active modes in BaFe${}_2$As${}_2$
• Spin and Orbital Characters of Excitations in Iron Arsenide Superconductors Revealed by Simulated Fe L-Edge RIXS
• Upper critical field anisotropy in BaFe2-xCoxAs2 single crystals synthesized without flux
• Quasiparticle interference in antiferromagnetic parent compounds of Fe-based superconductors
• Uniaxial "nematic-like" electronic structure and Fermi surface of untwinned CaFe2As2
• Comment on "Nematic Electronic Structure in the "Parent" State of the Iron-Based Superconductor Ca(Fe1-xCox)2As2"