Ising and Spin orders in Iron-Based Superconductors
| Title: | Ising and Spin orders in Iron-Based Superconductors |
| Author: |
Xu, Cenke; Mueller, Markus; Sachdev, Subir
Note: Order does not necessarily reflect citation order of authors. |
| Citation: | Xu, Cenke, Markus Mueller, and Subir Sachdev. 2008. Ising and spin orders in iron-based superconductors. Physical Review B 78(2): 020501. |
| Full Text & Related Files: |
0804.4293v4.pdf (133.9Kb; PDF) 
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| Abstract: | Motivated by recent neutron scattering experiments, we study the ordering of spins in the iron-based superconductors La(O\(_{1-x}\)F\(_x\))FeAs, assuming them in proximity to a Mott insulator in the phase diagram. The ground state of the parent system with x = 0 is a spin density wave with ordering wave vector \(\vec{Q}\) = (0, \(\pi\)) or (\(\pi\), 0). Upon raising the temperature, we find the system to restore SU(2) symmetry, while an Ising symmetry remains broken, explaining the experimentally observed lattice distortion to a monoclinic crystal structure. Upon further temperature increase, the spins finally disorder at a second transition. The phase transition driven by doping with charge carriers similarly splits into an O(3) transition, and an Ising transition with z = 3 at larger doping. |
| Published Version: | doi:10.1103/PhysRevB.78.020501 |
| Other Sources: | http://arxiv.org/abs/0804.4293v4 |
| Terms of Use: | This article is made available under the terms and conditions applicable to Open Access Policy Articles, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#OAP |
| Citable link to this page: | http://nrs.harvard.edu/urn-3:HUL.InstRepos:7349761 |
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