Physics – Condensed Matter – Superconductivity
Scientific paper
2009-05-09
Phys. Rev. Lett. 103, 097204 (2009)
Physics
Condensed Matter
Superconductivity
7 pages, 6 figures, version published in Physical Review Letters
Scientific paper
10.1103/PhysRevLett.103.097204
A Heisenberg model over the square lattice recently introduced by Si and Abrahams to describe local-moment magnetism in the new class of Fe-As high-Tc superconductors is analyzed in the classical limit and on a small cluster by exact diagonalization. In the case of spin-1 iron atoms, large enough Heisenberg exchange interactions between neighboring spin-1/2 moments on different iron 3d orbitals that frustrate true magnetic order lead to hidden magnetic order that violates Hund's rule. It accounts for the low ordered magnetic moment observed by elastic neutron diffraction in an undoped parent compound to Fe-As superconductors. We predict that low-energy spin-wave excitations exist at wavenumbers corresponding to either hidden Neel or hidden ferromagnetic order.
Rezayi Edward H.
Rodriguez Jose P.
No associations
LandOfFree
Low ordered magnetic moment by off-diagonal frustration in undoped parent compounds to iron-based high-Tc superconductors does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Low ordered magnetic moment by off-diagonal frustration in undoped parent compounds to iron-based high-Tc superconductors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low ordered magnetic moment by off-diagonal frustration in undoped parent compounds to iron-based high-Tc superconductors will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-688799