Competing Orders and Unconventional Criticality in the Su-Schrieffer-Heeger Model
Strongly Correlated Electrons
2020-04-13 v2
Abstract
The phase diagram of the one-dimensional Su-Schrieffer-Heeger model of spinless fermions coupled to quantum phonons is determined by quantum Monte Carlo simulations. It differs significantly from previous work. In addition to Luttinger liquid and bond-order-wave (BOW) phases, we find an extended charge-density-wave (CDW) phase. Because of different broken symmetries, BOW and CDW phases are connected by a retardation-driven phase transition. Our results are consistent with the theory of the frustrated chain, including unconventional power-law exponents at criticality, and an interpretation in terms of deconfined quantum criticality via proliferation of solitons.
Keywords
Cite
@article{arxiv.1905.05218,
title = {Competing Orders and Unconventional Criticality in the Su-Schrieffer-Heeger Model},
author = {Manuel Weber and Francesco Parisen Toldin and Martin Hohenadler},
journal= {arXiv preprint arXiv:1905.05218},
year = {2020}
}
Comments
12 pages 9 figures, including appendices