Simultaneous Vanishing of the Nematic Electronic State and the Structural Orthorhombicity in NaFe${}_{1-x}$Co${}_x$As Single Crystals

Abstract

We have carried out in-plane resistivity measurements under a uniaxial pressure in NaFe${}_{1-x}$Co${}_x$As single crystals. A clear distinction of the in-plane resistivity ${\rho }_a$ and ${\rho }_b$ with the uniaxial pressure along $b$-axis was discovered in the parent and underdoped regime with the doping level up to about x=0.025$\pm$0.002. From the deviating point of ${\rho }_a$ and ${\rho }_b$, and the unique kinky structure of resistivity together with the published data we determined the temperatures for the nematic, structural and antiferromagnetic transitions. It is clearly shown that the nematic electronic state vanishes simultaneously with the structural transition. The antiferromagnetic state disappears however at a lower doping level. Our results, in combination with the data in BaFe${}_{2-x}$Co${}_x$As${}_2$, indicate a close relationship between nematicity and superconductivity.

5 pages, 5 figures

References in corpus (12)

• Unconventional pairing originating from disconnected Fermi surfaces in superconducting LaFeAsO${}_{1-x}$F${}_x$}
• Direct observation of competition between superconductivity and charge density wave order in YBa2Cu3Oy
• Evidence for an electron nematic phase transition in underdoped iron pnictide superconductors
• A `checkerboard' electronic crystal state in lightly hole-doped Ca_{2-x}Na_{x}CuO_{2}Cl_{2}
• Nematic and meta-nematic transitions in the iron pnictides
• Nematic spin correlations in the tetragonal state of uniaxial strained BaFe2-xNixAs2
• Unprecedented anisotropic metallic state in BaFe2As2 revealed by optical spectroscopy
• Manifestations of nematic degrees of freedom in the magnetic, elastic, and superconducting properties of the iron pnictides
• Phase Diagram and Calorimetric Properties of NaFe${}_{1-x}$Co${}_x$As
• Transport and magnetic properties of La-doped CaFe${}_2$As${}_2$
• Evolution of Anisotropic In-plane Resistivity with doping level in Ca${}_{1-x}$Na${}_x$Fe${}_2$As${}_2$ Single Crystals
• Phase Separation, Competition, and Volume Fraction Control in NaFe${}_{1-x}$Co${}_x$As

Cited by in corpus (1)

• The three-dimensional electronic structure of the nematic and antiferromagnetic phases of NaFeAs from detwinned ARPES measurements