ar X iv : c on d - m at / 0 20 91 44 v 3 7 M ay 2 00 3 Fractionalized Fermi liquids

نویسنده

  • Matthias Vojta
چکیده

In spatial dimensions d ≥ 2, Kondo lattice models of conduction and local moment electrons can exhibit a fractionalized, non-magnetic state (FL∗) with a Fermi surface of sharp electron-like quasiparticles, enclosing a volume quantized by (ρa − 1)(mod 2), with ρa the mean number of all electrons per unit cell of the ground state. Such states have fractionalized excitations linked to the deconfined phase of a gauge theory. Confinement leads to a conventional Fermi liquid state, with a Fermi volume quantized by ρa(mod 2), and an intermediate superconducting state for the Z2 gauge case. The FL∗ state permits a second order metamagnetic transition in an applied magnetic field.

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تاریخ انتشار 2015