Exciton Mediated Superconductivity in PrOs4Sb12

Abstract

The most important character of the exotic superconductor PrOs4Sb12 is the existence of low-lying excitations (excitons) with a finite energy gap and it appears as the magnetic field-induced order above 4.5 T. We focus on the a_u conduction band, which hybridizes with a Pr 4f^2 state strongly, coupled to the excitons. It results in an attractive interaction between the conduction electrons. The symmetry of the superconducting order parameter is determined by dispersion relation of the exciton. For the bcc system PrOs4Sb12, a d-wave state [kx ky + omega ky kz + omega^2 kz kx, omega=exp(pm i 2 pi/3)] is stabilized with broken time reversal symmetry.

4 pages

References in corpus (13)

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• Spin-Orbital Wave Excitations in Orbitally Degenerate Exchange Model with Multipolar Interactions

Cited by in corpus (8)

• Direct Observation of Quadrupolar Excitons in the Heavy-Fermion Superconductor PrOs${}_4$Sb${}_{12}$
• On the Hidden Order in URu${}_2$Si${}_2$ --- Antiferro Hexadecapole Order and its Consequences
• Microscopic Approach to Magnetism and Superconductivity of $f$-Electron Systems with Filled Skutterudite Structure
• Sb-NQR probe for multipole degree of freedom in the first Pr-based heavy-fermion superconductor PrOs${}_4$Sb${}_{12}$
• Symmetry properties of the nodal superconductor PrOs4Sb12
• Magnetic Exciton Mediated Superconductivity in the Hidden-Order Phase of URu2Si2
• Exciton Mediated Triplet Superconductivity in Th System PrOs4Sb12
• Microscopic theories for cubic and tetrahedral superconductors: application to PrOs_4Sb_{12}