Fermi Liquid Instabilities in the Spin Channel
By Congjun Wu, K. Sun, E. Fradkin, Shoucheng Zhang. 2006
189 citations recorded by the source corpus.
We study the Fermi surface instabilities of the Pomeranchuk type in the spin triplet channel with high orbital partial waves (F{sub l}{sup a} (l > 0)). The ordered phases are classified into two classes, dubbed the {alpha} and {beta}-phases by analogy to the superfluid {sup 3}He-A and B-phases. The Fermi surfaces in the {alpha}-phases exhibit spontaneous anisotropic distortions, while those in the {beta}-phases remain circular or spherical with topologically non-trivial spin configurations in momentum space. In the {alpha}-phase, the Goldstone modes in the density channel exhibit anisotropic overdamping. The Goldstone modes in the spin channel have nearly isotropic underdamped dispersion relation at small propagating wavevectors. Due to the coupling to the Goldstone modes, the spin wave spectrum develops resonance peaks in both the {alpha} and {beta}-phases, which can be detected in inelastic neutron scattering experiments. In the p-wave channel {beta}-phase, a chiral ground state inhomogeneity is spontaneously generated due to a Lifshitz-like instability in the originally nonchiral systems. Possible experiments to detect these phases are discussed.
Subfields: Atomic and Molecular Physics, and Optics, Condensed Matter Physics
View Paper: https://www.semanticscholar.org/paper/6e1f64a21ca4d021630f546d9fc1a83dcfbcd13c
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In Condensed Matter Physics
Citations in the corpus
- Crystal-symmetry-paired spin–valley locking in a layered room-temperature metallic altermagnet candidate (2024, unknown): “The latter is traditionally associated with the time-reversal symmetry breaking from the internal magnetization of ferromagnets, resulting in momentum-independent Zeeman-type spin splitting in the band structure.”
- Topological transition from nodal to nodeless Zeeman splitting in altermagnets (2023, background): “[21], results in an altermagnet; note, however, that an AM state can also be realized in insulators.”