Anomalous Spin Response in the Non-Centrosymmetric Metal CePt sub( 3)Si

Non-centrosymmetric metals with tetragonal structure are characterized by an antisymmetric Rashba-type spin-orbit interaction, which has been predicted to give rise to anomalous spin susceptibility. Our polarized inelastic neutron scattering measurements in the normal phase of the heavy-fermion supe...

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Bibliographic Details
Published in:Journal of the Physical Society of Japan 2014-06, Vol.83 (6), p.1-1
Main Authors: Fak, Bjorn, Adroja, Devashibhai T, Enderle, Mechthild, Bohm, Martin, Lapertot, Gerard, Mineev, Vladimir P
Format: Article
Language:English
Subjects:
Fermions
Mathematical analysis
Mathematical models
Neutron scattering
Rare earth metals
Silicon
Spin-orbit interactions
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Summary:Non-centrosymmetric metals with tetragonal structure are characterized by an antisymmetric Rashba-type spin-orbit interaction, which has been predicted to give rise to anomalous spin susceptibility. Our polarized inelastic neutron scattering measurements in the normal phase of the heavy-fermion superconductor CePt3 Si confirm this prediction. We find that for a finite wave vector along the crystallographic a-direction the spin susceptibility X sub(aa) is different from X sub(bb) by a factor of two. The effect is even larger than in theoretical calculations based on the Hubbard model, and we speculate that this is due to the strong spin-orbit coupling of rare-earth heavy fermions.
ISSN:0031-9015
1347-4073