Influence of O2 molecular orientation on p-orbital ordering and exchange pathways in Cs4O6

Arcon D, Anderle K, Klanjsek M, Sans A, Muehle C, Adler P, Schnelle W, Jansen M, Felser C (2013)

Publication Type: Journal article

Publication year: 2013

Journal

Physical Review B - Condensed Matter and Materials Physics American Physical Society (APS)

Book Volume: 88

Article Number: 224409

Journal Issue: 22

DOI: 10.1103/PhysRevB.88.224409

Abstract

The coupling of charge, lattice, orbital, and spin degrees of freedom was studied in a p-electron mixed-valence Cs4O6 compound by the electron paramagnetic resonance (EPR) and 133Cs nuclear magnetic resonance (NMR). The dramatic differences in the evolution of the EPR and 133Cs NMR spectra measured under different cooling protocols reveal two competing low-temperature phases: quenched high-temperature cubic and the low-temperature low-symmetry phases, respectively. They differ in the orientation of O2- anion axes, the ordering of π* molecular orbitals, and the superexchange interactions through the Cs+ bridges. The transformation between the two phases involves large amplitude reorientations of O2 groups and is extremely sluggish, thus explaining the coexistence of both phases and the deviations of the magnetic susceptibility from the simple Curie-Weiss dependence at low temperatures. © 2013 American Physical Society.

Involved external institutions

Jožef Stefan Institute SI Slovenia (SI) Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids DE Germany (DE) Max-Planck-Institut für Festkörperforschung DE Germany (DE)

How to cite

APA:

Arcon, D., Anderle, K., Klanjsek, M., Sans, A., Muehle, C., Adler, P.,... Felser, C. (2013). Influence of O2 molecular orientation on p-orbital ordering and exchange pathways in Cs4O6. Physical Review B - Condensed Matter and Materials Physics, 88(22). https://doi.org/10.1103/PhysRevB.88.224409

MLA:

Arcon, D., et al. "Influence of O2 molecular orientation on p-orbital ordering and exchange pathways in Cs4O6." Physical Review B - Condensed Matter and Materials Physics 88.22 (2013).

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