scholarly journals Spin excitations in hole-overdoped iron-based superconductors

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
K. Horigane ◽  
K. Kihou ◽  
K. Fujita ◽  
R. Kajimoto ◽  
K. Ikeuchi ◽  
...  
Keyword(s):  
Iron Based Superconductors ◽  
Spin Excitations ◽  
Iron Based

scholarly journals The Role of Orbital Nesting in the Superconductivity of Iron-Based Superconductors

2021 ◽  
Vol 6 (3) ◽  
pp. 34
Author(s):  
Raquel Fernández-Martín ◽  
María J. Calderón ◽  
Laura Fanfarillo ◽  
Belén Valenzuela
Keyword(s):  
Low Energy ◽  
Gap Functions ◽  
Momentum Dependence ◽  
Iron Based Superconductors ◽  
Spin Excitations ◽  
The Common ◽  
Iron Based ◽  
Orbital Character ◽  
Key Parameter

We analyze the magnetic excitations and the spin-mediated superconductivity in iron-based superconductors within a low energy model that operates in the band basis, but fully incorporates the orbital character of the spin excitations. We show how the orbital selectivity, encoded in our low energy description, simplifies substantially the analysis and allows for analytical treatments, while retaining all the main features of both spin excitations and gap functions computed using multiorbital models. Importantly, our analysis unveils the orbital matching between the hole and electron pockets as the key parameter to determine the momentum dependence and the hierarchy of the superconducting gaps, instead of the Fermi surface matching, as in the common nesting scenario.

scholarly journals Importance of $${{d}}_{{{xy}}}$$ orbital and electron correlation in iron-based superconductors revealed by phase diagram for 1111-system

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Tsuyoshi Kawashima ◽  
Shigeki Miyasaka ◽  
Hirokazu Tsuji ◽  
Takahiro Yamamoto ◽  
Masahiro Uekubo ◽  
...  
Keyword(s):  
Electron Correlation ◽  
Weak Coupling ◽  
Structural Parameters ◽  
Structural Flexibility ◽  
Superconducting Transition ◽  
Iron Based Superconductors ◽  
Wide Range ◽  
Band Filling ◽  
Iron Based ◽  
Correlation Strength

AbstractThe structural flexibility at three substitution sites in LaFeAsO enabled investigation of the relation between superconductivity and structural parameters over a wide range of crystal compositions. Substitutions of Nd for La, Sb or P for As, and F or H for O were performed. All these substitutions modify the local structural parameters, while the F/H-substitution also changes band filling. It was found that the superconducting transition temperature $$T_{\text{c}}$$ T c is strongly affected by the pnictogen height $$h_{Pn}$$ h Pn from the Fe-plane that controls the electron correlation strength and the size of the $$d_{xy}$$ d xy hole Fermi surface (FS). With increasing $$h_{Pn}$$ h Pn , weak coupling BCS superconductivity switches to the strong coupling non-BCS one where electron correlations and the $$d_{xy}$$ d xy hole FS may be important.

scholarly journals In-plane electronic anisotropy resulted from ordered magnetic moment in iron-based superconductors

2020 ◽  
Vol 2 (3) ◽  
Author(s):  
S.-F. Wu ◽  
W.-L. Zhang ◽  
V. K. Thorsmølle ◽  
G. F. Chen ◽  
G. T. Tan ◽  
...  
Keyword(s):  
Magnetic Moment ◽  
Iron Based Superconductors ◽  
Iron Based

scholarly journals Temperature-dependent electric noise level in different iron-based superconductors

2014 ◽  
Vol 507 (1) ◽  
pp. 012002
Author(s):  
C Barone ◽  
S Pagano ◽  
E Bellingeri ◽  
C Ferdeghini ◽  
M Adamo ◽  
...  
Keyword(s):  
Noise Level ◽  
Temperature Dependent ◽  
Iron Based Superconductors ◽  
Electric Noise ◽  
Iron Based
Sign in / Sign up

Export Citation Format

Share Document