Ilya Eremin - Academia.edu (original) (raw)

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Papers by Ilya Eremin

Research paper thumbnail of Electronic theory for superconductivity in Sr2RuO4: Triplet pairing due to spin-fluctuation exchange

EPL (Europhysics …, 2007

Using a two-dimensional Hubbard Hamiltonian for the three electronic bands crossing the Fermi lev... more Using a two-dimensional Hubbard Hamiltonian for the three electronic bands crossing the Fermi level in Sr2RuO4 we calculate the band structure and spin susceptibility χ(q, ω) in quantitative agreement with nuclear magnetic resonance (NMR) and inelastic neutron scattering (INS) experiments. The susceptibility has two peaks at Qi = (2π/3, 2π/3) due to the nesting Fermi surface properties and at qi = (0.6π, 0) due to the tendency towards ferromagnetism. Applying spin-fluctuation exchange theory as in layered cuprates we determine from χ(q, ω), electronic dispersions, and Fermi surface topology that superconductivity in Sr2RuO4 consists of triplet pairing. Combining the Fermi surface topology and the results for χ(q, ω) we can exclude s− and d−wave symmetry for the superconducting order parameter. Furthermore, within our analysis and approximations we find that f -wave symmetry is slightly favored over p-wave symmetry due to the nesting properties of the Fermi surface. 74.20.Mn, 74.25.Ha

Research paper thumbnail of Electronic theory for superconductivity in Sr2RuO4: Triplet pairing due to spin-fluctuation exchange

EPL (Europhysics …, 2007

Using a two-dimensional Hubbard Hamiltonian for the three electronic bands crossing the Fermi lev... more Using a two-dimensional Hubbard Hamiltonian for the three electronic bands crossing the Fermi level in Sr2RuO4 we calculate the band structure and spin susceptibility χ(q, ω) in quantitative agreement with nuclear magnetic resonance (NMR) and inelastic neutron scattering (INS) experiments. The susceptibility has two peaks at Qi = (2π/3, 2π/3) due to the nesting Fermi surface properties and at qi = (0.6π, 0) due to the tendency towards ferromagnetism. Applying spin-fluctuation exchange theory as in layered cuprates we determine from χ(q, ω), electronic dispersions, and Fermi surface topology that superconductivity in Sr2RuO4 consists of triplet pairing. Combining the Fermi surface topology and the results for χ(q, ω) we can exclude s− and d−wave symmetry for the superconducting order parameter. Furthermore, within our analysis and approximations we find that f -wave symmetry is slightly favored over p-wave symmetry due to the nesting properties of the Fermi surface. 74.20.Mn, 74.25.Ha

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