Volume 122, Number 5, June 2018
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||09 July 2018|
Multi-orbital nature of the spin fluctuations in Sr2RuO4
1 Department of Physics, University of Fribourg - 1700 Fribourg, Switzerland
2 I. Institut für Theoretische Physik, Universität Hamburg - D-20355 Hamburg, Germany
Received: 9 June 2018
Accepted: 22 June 2018
The spin susceptibility of strongly correlated Sr2RuO4 is known to display a rich structure in reciprocal space, with a prominent peak at . It is still debated if the resulting incommensurate spin-density-wave fluctuations foster unconventional superconductivity at low temperature or compete therewith. By means of density functional theory combined with dynamical mean-field theory, we reveal the realistic multi-orbital signature of the (dynamic) spin susceptibility beyond existing weak-coupling approaches. The experimental fluctuation spectrum up to 80 meV is confirmed by theory. Furthermore, the peak at Qi is shown to carry nearly equal contributions from each of the Ru orbitals, pointing to a cooperative effect resulting in the dominant spin fluctuations.
PACS: 71.27.+a – Strongly correlated electron systems; heavy fermions / 75.40.Gb – Dynamic properties (dynamic susceptibility, spin waves, spin diffusion, dynamic scaling, etc.) / 74.70.Pq – Ruthenates
© EPLA, 2018
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.