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Electronic and Magnetic Nano Phase Separation in Cobaltates La₂₋ₓSrₓCoO₄

Li, Z.W.; Drees, Y.; Ricci, A.; Lamago, D.; Piovano, A.; Rotter, M.; Schmidt, W.; Sobolev, O.; Rütt, U.; Gutowski, O.; Sprung, M.; Castellan, J.P.; Tjeng, L.H.; Komarek, A.C.

Abstract (englisch): The single-layer perovskite cobaltates have attracted enormous attention due to the recent observation of hour-glass shaped magnetic excitation spectra which resemble the ones of the famous high-temperature superconducting cuprates. Here, we present an overview of our most recent studies of the spin and charge correlations in floating-zone grown cobaltate single crystals. We find that frustration and a novel kind of electronic and magnetic nano phase separation are intimately connected to the appearance of the hour-glass shaped spin excitation spectra. We also point out the difference between nano phase separation and conventional phase separation.

Zugehörige Institution(en) am KIT Institut für Festkörperphysik (IFP)
Publikationstyp Zeitschriftenaufsatz
Jahr 2016
Sprache Englisch
Identifikator DOI: 10.1007/s10948-015-3302-4
ISSN: 1557-1939
URN: urn:nbn:de:swb:90-535463
KITopen ID: 1000053546
HGF-Programm 43.21.01; LK 01
Erschienen in Journal of Superconductivity and Novel Magnetism
Band 29
Heft 3
Seiten 727-731
Schlagworte Magnetic excitation spectra, Hour-glass. Cobaltate, Cuprate, Superconductor, Neutron, Synchrotron
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