Deformation of the Fermi Surface and Anomalous Mass Renormalization by Critical Spin Fluctuations through Asymmetric Spin-Orbit Interaction

Abstract

It is shown that an asymmetric spin-orbit interaction is appreciably renormalized by the effect of critical spin fluctuations. As an explicit example, the Rashba-type interaction is predicted to be suppressed by anti-ferromagnetic critical fluctuations near the hot line (or point), leading to a deformation of the Fermi surface near the hot line (or point) around which the band splitting is decreased, while ferromagnetic critical fluctuations are shown to enhance the Rashba-type interaction everywhere on the Fermi surface, leading to an increase in the band splitting. It is also found that the many-body mass renormalization, which diverges towards the magnetic quantum critical point, is in the opposite sign for the two split bands by the Rashba-type interaction. These predictions are observable by the de Haas-van Alphen (dHvA) effect in principle.

Published as an article in the Letter section of J. Phys. Soc. Jpn.; 11 pages, 2 figures; Supplemental Materials (20 pages) is referred as Ref. 23 in the main text

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• Electron Correlation and Pairing States in Superconductors without Inversion Symmetry
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• Quantum impurity on the surface of a topological insulator
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Cited by in corpus (2)

• Even-odd parity transition in strongly correlated locally noncentrosymmetric superconductors : An application to CeRh${}_2$As${}_2$
• Electron Correlation Effects in Non-Centrosymmetric Metals in the Weak Coupling Regime