Soliton Defects in One-dimensional Topological Three-band Hamiltonian
Strongly Correlated Electrons
2013-12-25 v3
Abstract
Defect formation in the one-dimensional topological three-band model is examined within both lattice and continuum models. Classic results of Jackiw-Rebbi and Rice-Mele for the soliton charge is generalized to the three-band model. The presence of the central flat band in the three-band model makes the soliton charge as a function of energy behave in a qualitatively different way from the two-band Dirac model case. Quantum field-theoretical calculation of Goldstone and Wilczek is also generalized to the three-band model to obtain the soliton charge. Diamond-chain lattice is shown to be an ideal structure to host a topological three-band structure.
Keywords
Cite
@article{arxiv.1306.0998,
title = {Soliton Defects in One-dimensional Topological Three-band Hamiltonian},
author = {Gyungchoon Go and Kyeong Tae Kang and Jung Hoon Han},
journal= {arXiv preprint arXiv:1306.0998},
year = {2013}
}
Comments
4 pages, 3 figures, supplement information (1 figure)