Spin-incoherent behavior in the ground state of strongly correlated systems

ORAL

Abstract

It is commonly believed that strongly interacting one-dimensional Fermi systems with gapless excitations are effectively described by Luttinger liquid theory. However, when the temperature of the system is high compared to the spin energy, but small compared to the charge energy, the system becomes ``spin-incoherent.'' We present numerical evidence showing that the one-dimensional ``t-J-Kondo'' lattice, consisting of a t-J chain interacting with localized spins, displays all the characteristic signatures of spin-incoherent physics, but in the ground state. We argue that similar physics may be present in a wide range of strongly interacting systems.

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Authors

  • Gregory A. Fiete

    University of Texas at Austin, Department of Physics, The University of Texas at Austin, Austin, Texas 78712, USA, The University of Texas at Austin, Department of Physics,The University of Texas at Austin

  • Adrian Feiguin

    University of Wyoming, WY, Department of Physics and Astronomy, University of Wyoming, Laramie, Wyoming 82071, USA, University of Wyoming