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

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 {\it ground state}. We argue that similar physics may be present in a wide range of strongly interacting systems.

4 pages, 2 figs. New figs, including phase diagram, and expanded theory

References in corpus (6)

• Real time evolution using the density matrix renormalization group
• Green's function for magnetically incoherent interacting electrons in one dimension
• Localization Transition in a Ballistic Quantum Wire
• Spin-Incoherent Transport in Quantum Wires
• Fourier transform of the $2k_F$ Luttinger liquid density correlation function with different spin and charge velocities
• Singular responses of spin-incoherent Luttinger liquids

Cited by in corpus (1)

• In a tight spot, spin and charge separate