scholarly journals Ab initio Derivation of Low-Energy Model for Iron-Based Superconductors LaFeAsO and LaFePO

2008 ◽  
Vol 77 (9) ◽  
pp. 093711 ◽  
Author(s):  
Kazuma Nakamura ◽  
Ryotaro Arita ◽  
Masatoshi Imada
Keyword(s):  
Ab Initio ◽  
Energy Model ◽  
Low Energy ◽  
Iron Based Superconductors ◽  
Iron Based

scholarly journals RESPACK: An ab initio tool for derivation of effective low-energy model of material

2021 ◽  
Vol 261 ◽  
pp. 107781
Author(s):  
Kazuma Nakamura ◽  
Yoshihide Yoshimoto ◽  
Yusuke Nomura ◽  
Terumasa Tadano ◽  
Mitsuaki Kawamura ◽  
...  
Keyword(s):  
Ab Initio ◽  
Energy Model ◽  
Low Energy

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 Magnetic Properties of Ab initio Model of Iron-Based Superconductors LaFeAsO

2011 ◽  
Vol 80 (2) ◽  
pp. 023704 ◽  
Author(s):  
Takahiro Misawa ◽  
Kazuma Nakamura ◽  
Masatoshi Imada
Keyword(s):  
Magnetic Properties ◽  
Ab Initio ◽  
Iron Based Superconductors ◽  
Iron Based

scholarly journals Ab initio Derivation of Low-Energy Model for κ-ET Type Organic Conductors

2009 ◽  
Vol 78 (8) ◽  
pp. 083710 ◽  
Author(s):  
Kazuma Nakamura ◽  
Yoshihide Yoshimoto ◽  
Taichi Kosugi ◽  
Ryotaro Arita ◽  
Masatoshi Imada
Keyword(s):  
Ab Initio ◽  
Organic Conductors ◽  
Energy Model ◽  
Low Energy

scholarly journals Density-matrix based determination of low-energy model Hamiltonians from ab initio wavefunctions

2015 ◽  
Vol 143 (10) ◽  
pp. 102814 ◽  
Author(s):  
Hitesh J. Changlani ◽  
Huihuo Zheng ◽  
Lucas K. Wagner
Keyword(s):  
Density Matrix ◽  
Ab Initio ◽  
Energy Model ◽  
Low Energy ◽  
Model Hamiltonians
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