Condensed-Matter Physics & Materials Science Seminar
"Spin-orbit coupling and electronic correlations in Hund's metals: Sr2RuO4"
Presented by Minjae Kim, École Polytechnique, France
Monday, January 22, 2018, 1:30 pm — ISB Bldg. 734 Conf. Rm. 201 (upstairs)
We investigate the interplay of spin-orbit coupling (SOC) and Hund's rule coupling driven electronic correlations in Sr2RuO4 using dynamical mean-field theory. We find that the orbital diagonal components of the dynamical electronic correlations are unaffected by the SOC, which validates the concept of a Hund's metal in the presence of SOC. In contrast, SOC itself is enhanced by approximately a factor of two by electronic correlations. We introduce the concept of an energy dependent quasiparticle SOC, which is found to be essential in accounting simultaneously for: (i)
the Fermi surface (ii) the low-energy dispersion of quasiparticles and (iii) the splitting between bands at higher binding energy. Our calculations are in good agreement with available experimental data.
 C. Veenstra et al., Physical Review Letters 112, 127002 (2014)
 M. Haverkort et al., Physical Review Letters 101, 026406 (2008)
 J. Mravlje et al., Physical Review Letters 106, 096401 (2011)
 M. Kim et al., arXiv preprint arXiv:1707.02462 (2017)
Hosted by: Gabi Kotliar
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