# Charge Density Wave in a Doped Kondo Chain

## TL;DR

This paper demonstrates the existence of a charge density wave phase in a 1D doped Kondo lattice model at a specific filling, driven by effective Coulomb interactions mediated by localized spins, expanding the known phase diagram.

## Contribution

It reveals a new CDW phase in the 1D Kondo lattice model at n=0.75 filling, induced without bare repulsive interactions, using density matrix renormalization group simulations.

## Key findings

- CDW phase appears at n=0.75 filling in the paramagnetic region
- CDW is driven by effective Coulomb repulsion mediated by localized spins
- Phase diagram of 1D Kondo lattice model is enriched by this discovery

## Abstract

We report the existence of the charge density wave (CDW) in the ground state of 1D Kondo lattice model at the filling of n=0.75 in the weak coupling region. The CDW is driven by the effective Coulomb repulsion mediated by the localized spins. Based on our numerical results using the density matrix renormalization group method, we show that the CDW phase appears in the paramagnetic region previously known as the Tomonaga-Luttinger liquid. The emergence of this phase serves as an example of CDW phase induced without bare repulsive interactions, and enriches the phase diagram of the 1D Kondo lattice model.