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- W3100641088 abstract "The two-orbital Hubbard-Kanamori model is studied using the strong coupling diagram technique. This approach allows one to take into account the interactions of electrons with spin, charge, and orbital fluctuations of all ranges. It was found that, at low temperatures, the model has four regions of the negative electron compressibility, which can lead to charge inhomogeneities with the assistance of phonons. For half-filling, the phase diagram of the model contains regions of the Mott and Slater insulators, bad-metal, and states with spin-polaron peaks. These sharp peaks at the Fermi level are seen in doped states also. A finite Hund coupling leads to a large increase of antiferromagnetic spin correlations with strong suppression of charge and orbital fluctuations near half-filling. For moderate doping, all types of correlations become comparable. They peak at the antiferromagnetic wave vector except for a narrow region with an incommensurate response. Stronger doping destroys all correlations." @default.
- W3100641088 created "2020-11-23" @default.
- W3100641088 creator A5002821534 @default.
- W3100641088 date "2020-08-07" @default.
- W3100641088 modified "2023-09-25" @default.
- W3100641088 title "Hubbard-Kanamori model: spectral functions, negative electron compressibility, and susceptibilities" @default.
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- W3100641088 doi "https://doi.org/10.1088/1402-4896/aba923" @default.
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