Superconducting phase diagram of the paramagnetic one-band Hubbard model

Andreas Kreisel; Astrid Tranum Rømer; P.J. Hirschfeld; Brian Møller Andersen

doi:10.1007/s10948-016-3758-x

Superconducting phase diagram of the paramagnetic one-band Hubbard model

Andreas Kreisel, Astrid Tranum Rømer, P.J. Hirschfeld, Brian Møller Andersen

Xray and Neutron Science

3 Citations (Scopus)

Abstract

We study spin-fluctuation-mediated superconductivity in the one-band Hubbard model. Higher-order effective interactions in U give rise to a superconducting instability which is very sensitive to changes in the Fermi surface topology arising as a function of doping and changes in the band structure. We show the superconducting phase diagram as a function of doping and next-nearest neighbor hopping in the limit of very small Coulomb interaction strength and discuss peculiarities arising at the phase boundaries separating different superconducting domains.

Original language	English
Journal	Journal of Superconductivity and Novel Magnetism
Volume	30
Issue number	1
Pages (from-to)	85-89
Number of pages	5
ISSN	1557-1939
DOIs	https://doi.org/10.1007/s10948-016-3758-x
Publication status	Published - 1 Jan 2017

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AU - Andersen, Brian Møller

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N2 - We study spin-fluctuation-mediated superconductivity in the one-band Hubbard model. Higher-order effective interactions in U give rise to a superconducting instability which is very sensitive to changes in the Fermi surface topology arising as a function of doping and changes in the band structure. We show the superconducting phase diagram as a function of doping and next-nearest neighbor hopping in the limit of very small Coulomb interaction strength and discuss peculiarities arising at the phase boundaries separating different superconducting domains.

AB - We study spin-fluctuation-mediated superconductivity in the one-band Hubbard model. Higher-order effective interactions in U give rise to a superconducting instability which is very sensitive to changes in the Fermi surface topology arising as a function of doping and changes in the band structure. We show the superconducting phase diagram as a function of doping and next-nearest neighbor hopping in the limit of very small Coulomb interaction strength and discuss peculiarities arising at the phase boundaries separating different superconducting domains.

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Superconducting phase diagram of the paramagnetic one-band Hubbard model

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