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9 papers · 2 filters
Flat band in the core of topological defects: bulk-vortex correspondence in topological superfluids with Fermi points
G. E. Volovik
We discuss the dispersionless spectrum with zero energy in the linear topological defects - vortices. The flat band emerges inside the vortex living in the bulk medium containing t…
Relationship between orbital structure and lattice distortions: CE phase of manganites, revisited
A. O. Sboychakov, K. I. Kugel, A. L. Rakhmanov +1
Analyzing the orbital structure and lattice distortions in the CE phase of half-doped manganites, we demonstrate that the usual approach directly relating the orbital occupation of…
Soft-mode behavior of electromagnons in multiferroic manganite
A. M. Shuvaev, J. Hemberger, D. Niermann +6
The behavior of the low-frequency electromagnon in multiferroic DyMnO3 has been investigated in external magnetic fields and in a magnetically ordered state. Significant softening…
Orbital Selective Pressure-Driven Metal-Insulator Transition in FeO from Dynamical Mean-Field Theory
A. ~O. ~Shorikov, Z. ~V. ~Pchelkina, V. ~I. ~Anisimov +2
In this Letter we report the first LDA+DMFT (method combining Local Density Approximation with Dynamical Mean-Field Theory) results of magnetic and spectral properties calculation…
Spin wave resonances in antiferromagnets
H. -A. Krug von Nidda, L. E. Svistov, L. A. Prozorova
Spin wave resonances with enormously large wave numbers corresponding to wave vectors 10^5-10^6 cm^{-1} are observed in thin plates of FeBO3. The study of spin wave resonances allo…
Interplay of electron-phonon interaction and strong correlations: DMFT+Sigma approach
M. V. Sadovskii, E. Z. Kuchinskii, I. A. Nekrasov
We discuss interaction of strongly correlated electrons (described within the Hubbard model solved by dynamical mean-field theory (DMFT)) with Debye and Einstein phonons using rece…