Exotic multi-gap structure in UPt${}_3$ unveiled by the first-priniciples analysis

Abstract

A heavy-fermion superconductor UPt${}_3$ is a unique spin-triplet superconductor with multiple superconducting phases. Here we provide the first report on the first-principles analysis of the microscopic superconducting gap structure. We find that the promising gap structure is an unprecedented $E_{2u}$ state, which is completely different from the previous phenomenological $E_{2u}$ models. Our obtained $E_{2u}$ state has in-plane twofold vertical line nodes on small Fermi surfaces and point nodes with linear dispersion on a large Fermi surface. These peculiar features cannot be explained in the conventional spin $1/2$ representation, but is described by the group-theoretical representation of the Cooper pairs in the total angular momentum $j=5/2$ space. Our findings shed new light on the long-standing problems in the superconductivity of UPt${}_3$

9 pages, 6 figures

References in corpus (6)

• The Order Parameter for the Superconducting Phases of UPt${}_3$
• Observation of broken time-reversal symmetry in the heavy fermion superconductor UPt${}_3$
• Emergent Rank-5 'Nematic' Order in URu2Si2
• Emergent loop-nodal s${}_{\pm }$-wave superconductivity in CeCu${}_2$Si${}_2$: similarities to the iron-based superconductors
• The Fermi surface and f-valence electron count of UPt3
• Anomalous Field-Angle Dependence of the Specific Heat of Heavy-Fermion Superconductor UPt3

Cited by in corpus (8)

• Bogoliubov Fermi surfaces in superconductors with broken time-reversal symmetry
• Orbital Selective Superconductivity in a Two-band Model of Infinite-Layer Nickelates
• Three-Dimensional Majorana Fermions in Chiral Superconductors
• Symmetry protected line nodes in non-symmorphic magnetic space groups: Applications to UCoGe and UPd${}_2$Al${}_3$
• Möbius topological superconductivity in UPt${}_3$
• Nematic and chiral superconductivity induced by odd-parity fluctuations
• Intrinsic ac anomalous Hall effect of nonsymmorphic chiral superconductors with an application to $\mathrm{UP}{\mathrm{t}}_3$
• Surface state tunneling signatures in two-component superconductor UPt${}_3$