Absence of nematic instability in LiFeAs

Abstract

The relationship between unconventional superconductivity, antiferromagnetism and nematic order in iron-based superconductors (FeSCs) is still highly debated. In many FeSCs superconductivity is in proximity of a nematically and magnetically ordered state. LiFeAs is an exceptional stoichiometric FeSC becoming superconducting below 18 K, without undergoing a structural or magnetic transition. However, some recent experimental studies suggested the existence of finite nematic fluctuations and even a nematic superconducting state. In this study, we employ elastoresistance as a measure of nematic fluctuations in pristine LiFeAs and compare the findings with the elastoresistance of LiFeAs at low Co and V doping levels as well with that of magnetically and nematically ordering NaFeAs. We find LiFeAs and cobalt-doped LiFeAs far away from a nematic instability.

References in corpus (28)

• Nematic order in iron superconductors - who is in the driver's seat?
• Gap symmetry and structure of Fe-based superconductors
• The superconductivity at 18 K in LiFeAs system
• Divergent nematic susceptibility in an iron arsenide superconductor
• Ubiquitous signatures of nematic quantum criticality in optimally doped Fe-based superconductors
• Nematic quantum critical point without magnetism in FeSe1-xSx superconductors
• Manifestations of nematic degrees of freedom in the magnetic, elastic, and superconducting properties of the iron pnictides
• Symmetry breaking via orbital-dependent reconstruction of electronic structure in uniaxially strained NaFeAs
• The Synthesis and Characterization of LiFeAs and NaFeAs
• Magnetism, superconductivity, and spontaneous orbital order in iron-based superconductors: who comes first and why?
• Origin of the Resistivity Anisotropy in the Nematic Phase of FeSe
• Electronic nematic susceptibility of iron-based superconductors
• Magnetoelastic Coupling in the Phase Diagram of Ba1-xKxFe2As2
• A de Haas-van Alphen study of the Fermi surfaces of superconducting LiFeP and LiFeAs
• Multiorbital effects on the transport and the superconducting fluctuations in LiFeAs
• Enhancement of Superfluid Stiffness, Suppression of Superconducting T_c and Field-induced Magnetism in the Pnictide Superconductor LiFeAs
• Unified phase diagram for iron-based superconductors
• Discovery of a strain-stabilised smectic electronic order in LiFeAs
• Superconductivity-induced nematicity
• The anomaly Cu doping effects on LiFeAs superconductors
• Evolution of the nematic susceptibility in LaFe${}_{1-x}$Co${}_x$AsO
• Crystal growth and the electronic phase diagram of the 4$d$ doped Na${}_{1-\delta }$Fe${}_{1-x}$Rh${}_x$As in comparison with 3$d$ doped Na${}_{1-\delta }$Fe${}_{1-x}$Co${}_x$As
• Unusual temperature evolution of superconductivity in LiFeAs
• Magnetic fluctuations and spin freezing in nonsuperconducting LiFeAs derivatives
• Observation of non-Fermi liquid behavior in hole-doped LiFe${}_{1-x}$V${}_x$As
• Strain-derivative of thermoelectric properties: a sensitive probe for nematicity
• Spectroscopic evidence of nematic fluctuations in LiFeAs
• Evolution of superconductivity and antiferromagnetic order in Ba(Fe${}_{0.92-x}$Co${}_{0.08}$V${}_x$)${}_2$As${}_2$