Stable Flatbands, Topology, and Superconductivity of Magic Honeycomb Networks
Strongly Correlated Electrons
2020-04-08 v3 Mesoscale and Nanoscale Physics
Materials Science
Superconductivity
Abstract
We propose a new principle to realize flatbands which are robust in real materials, based on a network superstructure of one-dimensional segments. This mechanism is naturally realized in the nearly commensurate charge-density wave of 1T-TaS with the honeycomb network of conducting domain walls, and the resulting flatband can naturally explain the enhanced superconductivity. We also show that corner states, which are a hallmark of the higher-order topological insulators, appear in the network superstructure.
Keywords
Cite
@article{arxiv.1907.00012,
title = {Stable Flatbands, Topology, and Superconductivity of Magic Honeycomb Networks},
author = {Jongjun M. Lee and Chenhua Geng and Jae Whan Park and Masaki Oshikawa and Sung-Sik Lee and Han Woong Yeom and Gil Young Cho},
journal= {arXiv preprint arXiv:1907.00012},
year = {2020}
}
Comments
7+16 pages, 2+14 figures, Accepted version to PRL