Asymmetric Zero-Bias Anomaly for Strongly Interacting Electrons in One Dimension

Abstract

We study a system of one-dimensional electrons in the regime of strong repulsive interactions, where the spin exchange coupling J is small compared with the Fermi energy, and the conventional Tomonaga-Luttinger theory does not apply. We show that the tunneling density of states has a form of an asymmetric peak centered near the Fermi level. In the spin-incoherent regime, where the temperature is large compared to J, the density of states falls off as a power law of energy εmeasured from the Fermi level, with the prefactor at positive energies being twice as large as that at the negative ones. In contrast, at temperatures below J the density of states forms a split peak with most of the weight shifted to negative ε.

4 pages, 2 figures

References in corpus (3)

• Spin-charge separation and localization in one-dimension
• Green's function for magnetically incoherent interacting electrons in one dimension
• Fermi-edge singularity in a spin-incoherent Luttinger liquid

Cited by in corpus (10)

• Wigner crystal physics in quantum wires
• Spin-charge separation in one-dimensional fermion systems beyond the Luttinger liquid theory
• Spin-Incoherent Transport in Quantum Wires
• Spectral functions of strongly interacting isospin-1/2 bosons in one dimension
• Bosonization of strongly interacting electrons
• Spin-charge separation in a strongly correlated spin-polarized chain
• Length-Dependent Conductance of a Spin-Incoherent Hubbard chain; Monte Carlo Calculations
• Tunneling Density of States, Pair Correlation, and Josephson Current in Spin-Incoherent Luttinger Liquid-Superconductor Hybrid Systems
• Singular responses of spin-incoherent Luttinger liquids
• Junctions of Spin-Incoherent Luttinger Liquids with Ferromagnets and Superconductors