This title appears in the Scientific Report :
2014
Please use the identifier:
http://dx.doi.org/10.1038/ncomms6731 in citations.
Please use the identifier: http://hdl.handle.net/2128/8268 in citations.
Hour-glass magnetic excitations induced by nanoscopic phase separation in cobalt oxides
Hour-glass magnetic excitations induced by nanoscopic phase separation in cobalt oxides
The magnetic excitations in the cuprate superconductors might be essential for an understanding of high-temperature superconductivity. In these cuprate superconductors the magnetic excitation spectrum resembles an hour-glass and certain resonant magnetic excitations within are believed to be connect...
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Personal Name(s): | Drees, Y. |
---|---|
Li, Z. W. / Ricci, A. / Rotter, M. / Schmidt, W. / Lamago, D. / Sobolev, O. / Rütt, U. / Gutowski, O. / Sprung, M. / Piovano, A. / Castellan, J. P. / Komarek, A. C. (Corresponding Author) | |
Contributing Institute: |
Streumethoden; JCNS-2 JCNS-ILL; JCNS-ILL JARA-FIT; JARA-FIT Streumethoden; PGI-4 |
Published in: | Nature Communications, 5 (2014) S. 5731 |
Imprint: |
London
Nature Publishing Group
2014
|
PubMed ID: |
25534540 |
DOI: |
10.1038/ncomms6731 |
Document Type: |
Journal Article |
Research Program: |
JCNS In-house Research with PNI Neutrons Exploratory materials and phenomena Spin-based and quantum information |
Link: |
OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/8268 in citations.
The magnetic excitations in the cuprate superconductors might be essential for an understanding of high-temperature superconductivity. In these cuprate superconductors the magnetic excitation spectrum resembles an hour-glass and certain resonant magnetic excitations within are believed to be connected to the pairing mechanism, which is corroborated by the observation of a universal linear scaling of superconducting gap and magnetic resonance energy. So far, charge stripes are widely believed to be involved in the physics of hour-glass spectra. Here we study an isostructural cobaltate that also exhibits an hour-glass magnetic spectrum. Instead of the expected charge stripe order we observe nano phase separation and unravel a microscopically split origin of hour-glass spectra on the nano scale pointing to a connection between the magnetic resonance peak and the spin gap originating in islands of the antiferromagnetic parent insulator. Our findings open new ways to theories of magnetic excitations and superconductivity in cuprate superconductors. |