scholarly journals Macroscopic Quantum System, Highly Correlated Electron State, and High-Temperature Superconductivity in Iron Pnictides

2014 ◽  
Vol 05 (07) ◽  
pp. 523-533
Author(s):  
M. V. Krasinkova
Keyword(s):  
High Temperature ◽  
Quantum System ◽  
Electron State ◽  
High Temperature Superconductivity ◽  
Iron Pnictides ◽  
Macroscopic Quantum ◽  
Correlated Electron ◽  
Highly Correlated

scholarly journals Review on origin of the unusual high-Tc superconductivity in Ca1−xRExFe2As2 (RE = La, Ce, Pr, Nd)

2015 ◽  
Vol 1 (1) ◽  
Author(s):  
W. Zhou ◽  
Z. X. Shi
Keyword(s):  
High Temperature ◽  
Transition Temperature ◽  
Crystal Structures ◽  
High Temperature Superconductivity ◽  
Iron Pnictides ◽  
Iron Based Superconductors ◽  
High Tc ◽  
High Tc Superconductivity ◽  
Iron Based

AbstractSince the discovery of high temperature superconductivity in iron pnictides in 2008, many iron-based superconductors (IBSs) with various crystal structures have been exploited.Among them, superconductivity with the onset transition temperature T

scholarly journals RAMAN SCATTERING IN IRON-BASED SUPERCONDUCTORS

2012 ◽  
Vol 26 (28) ◽  
pp. 1230020 ◽  
Author(s):  
A. M. ZHANG ◽  
Q. M. ZHANG
Keyword(s):  
High Temperature ◽  
Raman Scattering ◽  
Cuprate Superconductors ◽  
High Temperature Superconductivity ◽  
Industrial Applications ◽  
Layered Compounds ◽  
Correlated Electron Systems ◽  
Correlated Electron ◽  
History Of ◽  
Iron Based

Iron-based superconducting layered compounds have the second highest transition temperature after cuprate superconductors. Their discovery is a milestone in the history of high-temperature superconductivity and will have profound implications for high-temperature superconducting mechanism as well as industrial applications. Raman scattering has been extensively applied to correlated electron systems including the new superconductors due to its unique ability to probe multiple primary excitations and their coupling. In this review, we will give a brief summary of the existing Raman experiments in the iron-based materials and their implications for pairing mechanism in particular. And we will also address some open issues from the experiments.

scholarly journals Superconductivity, Antiferromagnetism, and Kinetic Correlation in Strongly Correlated Electron Systems

2015 ◽  
Vol 2015 ◽  
pp. 1-5
Author(s):  
Takashi Yanagisawa
Keyword(s):  
High Temperature ◽  
Hubbard Model ◽  
High Temperature Superconductivity ◽  
Spin Fluctuation ◽  
Coulomb Repulsion ◽  
Strongly Correlated Electron ◽  
Correlated Electron Systems ◽  
Correlated Electron ◽  
Antiferromagnetic Correlation ◽  
The Stability

We investigate the ground state of two-dimensional Hubbard model on the basis of the variational Monte Carlo method. We use wave functions that include kinetic correlation and doublon-holon correlation beyond the Gutzwiller ansatz. It is still not clear whether the Hubbard model accounts for high-temperature superconductivity. The antiferromagnetic correlation plays a key role in the study of pairing mechanism because the superconductive phase exists usually close to the antiferromagnetic phase. We investigate the stability of the antiferromagnetic state when holes are doped as a function of the Coulomb repulsionU. We show that the antiferromagnetic correlation is suppressed asUis increased exceeding the bandwidth. High-temperature superconductivity is possible in this region with enhanced antiferromagnetic spin fluctuation and pairing interaction.

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