Effect of a strong spin-charge separation on tunneling into a 1D wire with impurity

We analyze the tunneling of electrons into a 1D nanowire with a large difference in velocities of spin and charge excitations: charges are ``fast,'' spins are ``slow.'' This system is modeled as a Wigner crystal of charges whose spins are ordered as in a antiferromagnetic Heisenberg spin chain. If the wire contains an impurity, electron tunneling in its vicinity causes a novel type of the orthogonality catastrophe. The tunneling electron shifts the charge distribution of a Wigner-crystal, which causes a shake-up processes in the spin sector. The corresponding suppression of the tunneling has a novel temperature dependence, which can be used for an experiemental validation of the spin-charge separation in low-density nanowires.