Emergent Pair Density Wave Order Across a Lifshitz Transition
Abstract
We numerically investigate the telltale signs of pair-density-wave order (PDW) in the Kondo-Heisenberg chain by focusing on the momentum resolved spectrum in different parameter regimes. Density matrix renormalization group calculations reveal that this phase is characterized by a dispersion with two minima and four Fermi points, indicating the emergence of an effective next-nearest-neighbor hopping that arises as a second-order effect to avoid magnetic frustration. The pairs appear in the spectrum as in-gap bound states with weight concentrated in the hole pockets. The low-energy physics can be understood by means of a generalized t-J model with next-nearest-neighbor hopping. Our results offer a guide for searching for experimental signatures, and for other models that can realize PDW physics.
Cite
@article{arxiv.2503.19761,
title = {Emergent Pair Density Wave Order Across a Lifshitz Transition},
author = {Luhang Yang and Elbio Dagotto and Adrian E. Feiguin},
journal= {arXiv preprint arXiv:2503.19761},
year = {2026}
}