3 papers
cond-mat.str-el2005
Effective spin-wave action for ordered Heisenberg antiferromagnets in a magnetic field
Nils Hasselmann, Florian Schuetz, Ivan Spremo +1
We derive the effective long-wavelength Euclidean action for the antiferromagnetic spin-waves of ordered quantum antiferromagnets subject to a uniform magnetic field. We point out…
cond-mat.str-el2005
Magnetic properties of a metal-organic antiferromagnet on a distorted honeycomb lattice
Ivan Spremo, Florian Schuetz, Peter Kopietz +6
For temperatures T well above the ordering temperature T*=3.0+-0.2K the magnetic properties of the metal-organic material Mn[C10H6(OH)(COO)]2x2H20 built from Mn^2+ ions and 3-hydro…
cond-mat.str-el2002
Spin-wave theory at constant order parameter
Marcus Kollar, Ivan Spremo, Peter Kopietz
We derive the low-temperature properties of spin-S quantum Heisenberg magnets from the Gibbs free energy G(M) for fixed order parameter M. Assuming that the low-lying elementary ex…