Hunds Rule Theory for Heavy Fermion Superconductors

Abstract

In this paper, a generalization of standard spin fluctuation theory is considered which takes into account orbital degeneracy effects which are critical for describing f electrons. This theory leads to an instability for a superconducting pair state which obeys Hunds rules. Such a state has L=5, S=1, and J=4. The degeneracy of this state is broken by crystalline effects, and realistic calculations for $UP{t}_3$ find a resultant pair state with ${\Gamma }_6^{-}$ symmetry, consistent with current experimental constraints.

revised manuscript, 15 pages (Plain TeX with macros), plus 1 postscript figure

References in corpus (1)

• Effect of Matrix Elements on the Pairing Kernel in Exchange Mediated Superconductors

Cited by in corpus (16)

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• Heat Transport and the Nature of the Order Parameter in Superconducting $UP{t}_3$
• Gap-anisotropic model for the narrow-gap Kondo insulators
• Exotic multi-gap structure in UPt${}_3$ unveiled by the first-priniciples analysis
• Spin-triplet s-wave local pairing induced by Hund's rule coupling
• Triplet pairing mechanisms from Hund's-Kondo models: applications to UTe${}_2$ and CeRh${}_2$As${}_2$
• Odd Parity and Line Nodes in Heavy Fermion Superconductors
• Calculation of Effective Coulomb Interaction for $P{r}^{3+}$, $U^{4+}$, and $UP{t}_3$
• Superconductivity and the high field ordered phase in the heavy fermion compound PrOs${}_4$Sb${}_{12}$
• The Triplet Resonating Valence Bond State and Superconductivity in Hund's Metals
• An Orbitally Degenerate Spin Fluctuation Model for Heavy Fermion Superconductivity
• Odd-Parity Triplet Pair Induced by Hund's Rule Coupling
• Strong Coupling Approach to the Supersymmetric Kondo Model
• Flat Topological Nodal Lines in Heavy-Fermion Compound CeCoGe${}_3$