An exact solution of the kinetic equation shows that conductivity in a non-Galilean-invariant disordered Fermi liquid depends on electron-electron interactions only through the quasiparticle scattering time, with the hydrodynamic optical response derived for low frequencies.
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Spin conductivity diverges near ferromagnetic quantum criticality from critical fluctuations, interpreted as incipient spin superfluidity.
NMR data show singular low-energy spin fluctuations in the strange-metal phase of La2-xSrxCuO4 at x=0.25 that increase down to lowest temperatures, extending beyond the stripe critical point at x=0.19 and linked to spatial inhomogeneity.
The model has a hybridized phase where spin-liquid Majorana fermions and conduction electrons form a common small Fermi surface violating the Luttinger count, with momentum-dependent coherence factors that produce Fermi arcs.
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Conductivity of a Non-Galilean--Invariant Fermi Liquid: Exact Solution of the Kinetic Equation
An exact solution of the kinetic equation shows that conductivity in a non-Galilean-invariant disordered Fermi liquid depends on electron-electron interactions only through the quasiparticle scattering time, with the hydrodynamic optical response derived for low frequencies.
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Divergent spin conductivity on the verge of ferromagnetic quantum criticality
Spin conductivity diverges near ferromagnetic quantum criticality from critical fluctuations, interpreted as incipient spin superfluidity.
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Tractable model for a fractionalized Fermi liquid (FL$^*$) on a square lattice
The model has a hybridized phase where spin-liquid Majorana fermions and conduction electrons form a common small Fermi surface violating the Luttinger count, with momentum-dependent coherence factors that produce Fermi arcs.