McCabe, E. E., Stock, C., Rodriguez, E. E., Wills, A. S., Taylor, J. W., Evans, J. S. O. (2014) Weak spin interactions in Mott insulating La2O2Fe2OSe2. Physical Review B, 89 (10). Article Number 100402. ISSN 1098-0121. (doi:10.1103/PhysRevB.89.100402) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:41293)
| The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. | |
| Official URL: http://dx.doi.org/10.1103/PhysRevB.89.100402 |
Abstract
Identifying and characterizing the parent phases of iron-based superconductors is an important step towards
understanding the mechanism for their high-temperature superconductivity. We present an investigation into
the magnetic interactions in the Mott insulator La2O2Fe2OSe2. This iron oxyselenide adopts a 2-k magnetic
structure with low levels of magnetic frustration. This magnetic ground state is found to be dominated by
next-nearest-neighbor interactions J2 and J2? and the magnetocrystalline anisotropy of the Fe2+ site, leading
to 2D-Ising-like spin S = 2 fluctuations. In contrast to calculations, the values are small and confine the spin
excitations below ?25 meV. This is further corroborated by sum rules of neutron scattering. This indicates that
superconductivity in related materials may derive from a weakly coupled and unfrustrated magnetic structure.
| Item Type: | Article |
|---|---|
| DOI/Identification number: | 10.1103/PhysRevB.89.100402 |
| Subjects: |
Q Science Q Science > QC Physics Q Science > QD Chemistry |
| Divisions: | Divisions > Division of Natural Sciences > Physics and Astronomy |
| Depositing User: | Emma McCabe |
| Date Deposited: | 10 Apr 2015 09:15 UTC |
| Last Modified: | 17 Aug 2022 10:57 UTC |
| Resource URI: | https://kar.kent.ac.uk/id/eprint/41293 (The current URI for this page, for reference purposes) |
University of Kent Author Information
McCabe, E. E..
| Creator's ORCID: |
 https://orcid.org/0000-0001-5868-4570
|
|---|---|
| CReDIT Contributor Roles: |
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