Fractionalized Fermi Liquids

T. Senthil, Subir Sachdev, and Matthias Vojta
Phys. Rev. Lett. 90, 216403 – Published 29 May 2003

Abstract

In spatial dimensions d2, Kondo lattice models of conduction and local moment electrons can exhibit a fractionalized, nonmagnetic state (FL*) with a Fermi surface of sharp electronlike quasiparticles, enclosing a volume quantized by (ρa1)(mod2), 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(mod2), and an intermediate superconducting state for the Z2 gauge case. The FL* state permits a second order metamagnetic transition in an applied magnetic field.

  • Figure
  • Received 16 September 2002

DOI:https://doi.org/10.1103/PhysRevLett.90.216403

©2003 American Physical Society

Authors & Affiliations

T. Senthil1, Subir Sachdev2, and Matthias Vojta3

  • 1Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
  • 2Department of Physics, Yale University, P.O. Box 208120, New Haven, Connecticut 06520-8120, USA
  • 3Institut für Theorie der Kondensierten Materie, Universität Karlsruhe, Postfach 6980, D-76128 Karlsruhe, Germany

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Vol. 90, Iss. 21 — 30 May 2003

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