Spin Excitations in Doped Manganites

• Authors: A. Oleś , L. Feiner
• Languages of publication: EN

Abstracts

EN

We generalize the double exchange to describe holes doped in degenerate e_{g} orbitals in La_{1-x}A_{x}MnO_{3} manganites, where A are divalent alkaline earth ions. Assuming an orbital liquid of disordered e_{g} orbitals we find isotropic ferromagnetic exchange interactions which increase with hole doping. The magnon dispersion agrees very well with the experimental data in ferromagnetic metallic manganites.

Keywords

EN

75.30.Ds; 75.30.Et; 71.27.+a

Discipline

• 75.30.Et: Exchange and superexchange interactions(see also 71.70.Gm Exchange interactions)
• 75.30.Ds: Spin waves(for spin-wave resonance, see 76.50.+g)
• 71.27.+a: Strongly correlated electron systems; heavy fermions

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2000
• Volume: 97
• Issue: 1
• Pages: 193-196

Dates

published

2000-01

Contributors

author

A. Oleś

• Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Kraków, Poland
• Max-Planck-Institut FKF, Heisenbergstrasse 1, 70569 Stuttgart, Germany

author

L. Feiner

• Institute for Theoretical Physics, Utrecht University, 3584 CC Utrecht, The Netherlands
• Philips Research Labs, Prof. Holstlaan 4, 5656 AA Eindhoven, The Netherlands

Identifiers

DOI

10.12693/APhysPolA.97.193