Low-energy magnetic response of the noncentrosymmetric heavy-fermion superconductor CePt3Si studied via inelastic neutron scattering

Abstract

The low-energy magnetic excitations of the noncentrosymmetric heavy-fermion superconductor CePt3Si have been measured with inelastic neutron scattering on a single crystal. Kondo-type spin fluctuations with an anisotropic wave vector dependence are observed in the paramagnetic state. These fluctuations do not survive in the antiferromagnetically ordered state below TN=2.2 K but are replaced by damped spin waves, whose dispersion is much stronger along the c-axis than in other directions. No change is observed in the excitation spectrum or the magnetic order as the system enters the superconducting state below Tc=0.7 K.

arXiv commentRevised version: 8 pages, 7 figures

References in corpus (12)

• Heavy fermion superconductivity and magnetic order in non-centrosymmetric $CeP{t}_{3}Si$
• Superconducting 2D system with lifted spin degeneracy: Mixed singlet-triplet state
• Heavy-fermion superconductivity in CeCoIn5 at 2.3K
• Spin resonance in the d-wave superconductor CeCoIn5
• Electron Correlation and Pairing States in Superconductors without Inversion Symmetry
• Line nodes in the superconducting gap function of noncentrosymmetric CePt_3Si
• Evidence for a Novel State of Superconductivity in Noncentrosymmetric CePt3Si : A 195Pt-NMR Study
• Evidence for Novel Pairing State in Noncentrosymmetric Superconductor CePt3Si: 29Si-NMR Knight Shift Study
• Study of low-energy magnetic excitations in single-crystalline CeIn3 by inelastic neutron scattering
• On the Coexistence Magnetism/Superconductivity in the Heavy-Fermion Superconductor CePt${}_3$Si
• Unconventional superconductivity and magnetism in $\mathrm{CeP}{\mathrm{t}}_3\mathrm{S}{\mathrm{i}}_{1-\mathrm{x}}\mathrm{G}{\mathrm{e}}_{\mathrm{x}}$
• Spin Fluctuation in Heavy Fermion CeRu_2Si_2

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• Local noncentrosymmetric structure of Bi2Sr2CaCu2O8+y by X-ray magnetic circular dichroism at Cu K-edge XANES
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• A microscopic Kondo lattice model for the heavy fermion antiferromagnet CeIn${}_3$
• Magnetic-field enhanced aniferromagnetism in non-centrosymmetric heavy-fermion superconductor CePt${}_3$Si
• Zero-energy excitation in the classical kagome antiferromagnet NaBa${}_2$Mn${}_3$F${}_{11}$
• Magnetic structure of the noncentrosymmetric heavy-fermion superconductor CePt3Si
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• Excess heat capacity in magnetically ordered Ce heavy fermion metals