Spin fluctuations and superconductivity in noncentrosymmetric heavy fermion systems CeRhSi${}_3$ and CeIrSi${}_3$

Abstract

We study the normal and the superconducting properties in noncentrosymmetric heavy fermion superconductors CeRhSi${}_3$ and CeIrSi${}_3$. For the normal state, we show that experimentally observed linear temperature dependence of the resistivity is understood through the antiferromagnetic spin fluctuations near the quantum critical point (QCP) in three dimensions. For the superconducting state, we derive a general formula to calculate the upper critical field $H_{c2}$, with which we can treat the Pauli and the orbital depairing effect on an equal footing. The strong coupling effect for general electronic structures is also taken into account. We show that the experimentally observed features in $H_{c2}\parallel \hat{z}$, the huge value up to 30(T), the downward curvatures, and the strong pressure dependence, are naturally understood as an interplay of the Rashba spin-orbit interaction due to the lack of inversion symmetry and the spin fluctuations near the QCP. The large anisotropy between $H_{c2}\parallel \hat{z}$ and $H_{c2}\perp \hat{z}$ is explained in terms of the spin-orbit interaction. Furthermore, a possible realization of the Fulde-Ferrell- Larkin-Ovchinnikov state for $H\perp \hat{z}$ is studied. We also examine effects of spin-flip scattering processes in the pairing interaction and those of the applied magnetic field on the spin fluctuations. We find that the above mentioned results are robust against these effects. The consistency of our results strongly supports the scenario that the superconductivity in CeRhSi${}_3$ and CeIrSi${}_3$ is mediated by the spin fluctuations near the QCP.

21pages, 13figures, to be published in Phys. Rev. B

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Cited by in corpus (16)

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• Physical properties of noncentrosymmetric superconductor LaIrSi3: A μSR study
• Antiferromagnetism and Superconductivity in Cerium based Heavy Fermion Compounds
• Mechanism, time-reversal symmetry and topology of superconductivity in noncentrosymmetric systems
• Direct observation of the quantum critical point in heavy fermion CeRhSi${}_3$
• Magnetism and Superconductivity in Ferromagnetic Heavy Fermion System UCoGe under In-plane Magnetic Fields
• Relaxing Kondo screened Kramers-doublets in CeRhSi${}_3$
• Renormalized quasiparticles, topological monopoles and superconducting line nodes in heavy fermion CeTX${}_3$ compounds
• Electron Correlation Effects in Non-Centrosymmetric Metals in the Weak Coupling Regime
• Pressure induced superconductivity in a CeRhSi${}_3$ single crystal -- the high pressure study
• Deformation of the Fermi Surface and Anomalous Mass Renormalization by Critical Spin Fluctuations through Asymmetric Spin-Orbit Interaction
• Supercurrent-Induced Weyl Superconductivity
• Absence of spin-orbit-coupling-induced effects on lattice dynamics in CePt3Si
• Effect of spin-orbit interaction on the vortex dynamics in LaAlO${}_3$/SrTiO${}_3$ interfaces near the superconducting transition
• The effect of Ni doping on the electronic structure and superconductivity in the noncentrosymmetric ThCoC2
• Delocalization of charge and current in a chiral quasiparticle wave-packet