Weak-coupling superconductivity in an anisotropic three-dimensional repulsive Hubbard model
Autor: | Thomas Scaffidi, Henrik Schou Røising, Steven H. Simon, Felix Flicker |
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Rok vydání: | 2018 |
Předmět: |
Coupling
Physics Superconductivity Hubbard model Condensed matter physics Strongly Correlated Electrons (cond-mat.str-el) Condensed Matter - Superconductivity FOS: Physical sciences Fermi surface Parameter space 01 natural sciences 010305 fluids & plasmas Superconductivity (cond-mat.supr-con) Condensed Matter - Strongly Correlated Electrons 0103 physical sciences 010306 general physics Anisotropy Ground state Phase diagram |
Zdroj: | Physical Review B. 98(22) |
ISSN: | 2469-9969 2469-9950 |
Popis: | We study a three-dimensional single-band repulsive Hubbard model at weak coupling. We establish the superconducting phase diagram in the parameter space of the chemical potential and the out-of-plane hopping strength. The model continuously connects the Hubbard model in two and three dimensions. We confirm previously-established results in these limits, and identify a rich structure of competing order parameters in between. Specifically, we find five types of $p$- and $d$-wave orders. In several regions of the phase diagram, even when the Fermi surface is a corrugated cylinder, the ground state is a time-reversal-symmetry-breaking superconductor with nodes, i.e. a Weyl superconductor. Comment: 9 pages, 7 figures |
Databáze: | OpenAIRE |
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