Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2008-08-19
Phys. Rev. B 78 (2008) 184518
Physics
Condensed Matter
Strongly Correlated Electrons
Revised version: 8 pages, 7 figures
Scientific paper
10.1103/PhysRevB.78.184518
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.
Braithwaite Daniel
Fåk B.
Lapertot Gerard
Mignot Jean-Michel
Raymond Sean
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