scholarly journals Orbital fluctuation theory in iron-based superconductors: -wave superconductivity, structure transition, and impurity-induced nematic order

2012 ◽  
Vol 152 (8) ◽  
pp. 718-727 ◽  
Author(s):  
Hiroshi Kontani ◽  
Yoshio Inoue ◽  
Tetsuro Saito ◽  
Youichi Yamakawa ◽  
Seiichiro Onari
Keyword(s):  
Fluctuation Theory ◽  
Iron Based Superconductors ◽  
Structure Transition ◽  
Nematic Order ◽  
Iron Based

scholarly journals Momentum Dependence of the Nematic Order Parameter in Iron-Based Superconductors

2019 ◽  
Vol 123 (6) ◽  
Author(s):  
H. Pfau ◽  
S. D. Chen ◽  
M. Yi ◽  
M. Hashimoto ◽  
C. R. Rotundu ◽  
...  
Keyword(s):  
Order Parameter ◽  
Momentum Dependence ◽  
Iron Based Superconductors ◽  
Nematic Order ◽  
Iron Based

scholarly journals What drives nematic order in iron-based superconductors?

2014 ◽  
Vol 10 (2) ◽  
pp. 97-104 ◽  
Author(s):  
R. M. Fernandes ◽  
A. V. Chubukov ◽  
J. Schmalian
Keyword(s):  
Iron Based Superconductors ◽  
Nematic Order ◽  
Iron Based

scholarly journals Emerging symmetric strain response and weakening nematic fluctuations in strongly hole-doped iron-based superconductors

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
P. Wiecki ◽  
M. Frachet ◽  
A.-A. Haghighirad ◽  
T. Wolf ◽  
C. Meingast ◽  
...  
Keyword(s):  
Hole Doping ◽  
Strain Response ◽  
Iron Based Superconductors ◽  
Optimal Doping ◽  
Plane Symmetric ◽  
Nematic Order ◽  
Unconventional Superconductors ◽  
Iron Based ◽  
Electronic Nematicity ◽  
Ordered State

AbstractElectronic nematicity is often found in unconventional superconductors, suggesting its relevance for electronic pairing. In the strongly hole-doped iron-based superconductors, the symmetry channel and strength of the nematic fluctuations, as well as the possible presence of long-range nematic order, remain controversial. Here, we address these questions using transport measurements under elastic strain. By decomposing the strain response into the appropriate symmetry channels, we demonstrate the emergence of a giant in-plane symmetric contribution, associated with the growth of both strong electronic correlations and the sensitivity of these correlations to strain. We find weakened remnants of the nematic fluctuations that are present at optimal doping, but no change in the symmetry channel of nematic fluctuations with hole doping. Furthermore, we find no indication of a nematic-ordered state in the AFe2As2 (A = K, Rb, Cs) superconductors. These results revise the current understanding of nematicity in hole-doped iron-based superconductors.

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