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

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arxiv 0808.2580 v2 pith:XHKTKNMS submitted 2008-08-19 cond-mat.str-el cond-mat.supr-con

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

B. Fak , S. Raymond , D. Braithwaite , G. Lapertot , J.-M. Mignot This is my paper
classification cond-mat.str-el cond-mat.supr-con
keywords magneticstatebelowcept3sifluctuationsheavy-fermioninelasticlow-energy
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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.

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