Self-Organized Growth, Structure, and Magnetism of Monatomic Transition-Metal Oxide Chains

Beitrag in einer Fachzeitschrift

Details zur Publikation

Autor(en): Ferstl P, Hammer L, Sobel C, Gubo M, Heinz K, Schneider MA, Mittendorfer F, Redinger J
Zeitschrift: Physical Review Letters
Verlag: American Physical Society
Jahr der Veröffentlichung: 2016
Band: 117
Heftnummer: 4
ISSN: 1079-7114
Sprache: Englisch


We report on the self-organized growth of monatomic transition-metal oxide chains of (3×1) periodicity and unusual MO2 stoichiometry (M=Ni, Co, Fe, Mn) on Ir(100). We analyze their structural and magnetic properties by means of quantitative LEED, STM, and density functional theory (DFT) calculations. LEED analyses reveal a fascinating common atomic structure in which the transition-metal atoms sit above a missing-row structure of the surface and are coupled to the substrate only via oxygen atoms. This structure is confirmed by DFT calculations with structural parameters deviating by less than 1.7 pm. The DFT calculations predict that the NiO2 chains are nonmagnetic, CoO2 chains are ferromagnetic, while FeO2 and MnO2 are antiferromagnetic. All structures show only weak magnetic interchain coupling. Further, we demonstrate the growth of oxide chains of binary alloys of Co and Ni or Fe on Ir(100), which allows us to produce well-controlled ensembles of ferromagnetic chains of different lengths separated by nonmagnetic or antiferromagnetic segments.

FAU-Autoren / FAU-Herausgeber

Ferstl, Pascal
Professur für Experimentalphysik
Hammer, Lutz Dr.
Lehrstuhl für Festkörperphysik
Heinz, Klaus Prof. Dr.
Naturwissenschaftliche Fakultät
Schneider, M. Alexander Prof. Dr.
Professur für Experimentalphysik

Autor(en) der externen Einrichtung(en)
Vienna University of Technology


Ferstl, P., Hammer, L., Sobel, C., Gubo, M., Heinz, K., Schneider, M.A.,... Redinger, J. (2016). Self-Organized Growth, Structure, and Magnetism of Monatomic Transition-Metal Oxide Chains. Physical Review Letters, 117(4).

Ferstl, Pascal, et al. "Self-Organized Growth, Structure, and Magnetism of Monatomic Transition-Metal Oxide Chains." Physical Review Letters 117.4 (2016).


Zuletzt aktualisiert 2018-17-11 um 13:50