Fermi-liquid - Fermi liquid theory Concept of Landau's...

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Fermi liquid theory Concept of Landau's Fermi liquid theory elementary excitations of interacting Fermions are described by almost independent fermionic quasiparticles state of Fermi liquid described simply by quasiparticle distribution Phenomenological Theory by Landau energy functional: deviation from ground state ground state distribution filled Fermi sea spin index
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Fermi liquid theory effective quasiparticle spectrum: bare quasiparticle spectrum: Fermi velocity: density of states at : Fermi volume conserved effective mass
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Fermi liquid theory couplings: symmetric (charge) antisymmetric (spin) spherical symmetry: Legendre Polynomials Landau parameters: charge spin
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Fermi liquid theory - physical properties specific heat: compressibility: spin susceptibility: change of Fermi volume spin splitting of Fermi sea T thermal softening of Fermi surface
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Fermi liquid theory - Gallilei invariance momentum shift for all particles shifted Fermi sea ''bare particle'' view quasiparticle view current density quasiparticle motion induced motion intrinsic consistency
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