2016/02/24 by G.‐Q. Hai, Guo-Qiang Hai, Hai, Guo-Qiang +2
Chemistry · Engineering · Physics and Astronomy · #Advanced Physical and Chemical Molecular Interactions #Crystallography and Radiation Phenomena #FOS: Physical sciences #Material Science and Thermodynamics #Strongly Correlated Electrons (cond-mat.str-el) #cond-mat.str-el
paper · pdf · doi:10.48550/arxiv.1602.07484
In this manuscript, we dealt with a system with holes in a single-electron band interacting with electron pairs. We found that the way we introduced the hole states was inaccurate. We recommend arXiv:1802.06593 for a system with single electrons and electron pairs
openalex publication_date 2016/02/24 · arxiv created 2018/04/02 · arxiv updated 2018/04/03 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
When atoms are organized into a crystal, the single-electron energy levels of individual atoms form energy bands. However, there also exist electron-pair states in atoms. We found previously that the counterpart of these electron-pair states of individual atoms may survive in a two-dimensional square-lattice crystal. When the amplitude of the crystal potential is larger than a certain value, a metastable electron-pair band arises between the two lowest single-electron energy bands. In this paper, we demonstrate that the many-particle exchange-correlation corrections renormalize the energy bands and may stabilize the electron pairs for certain hole and electron-pair densities in the two-dimensional crystal. Therefore, depending upon the crystal potential and free carrier densities, there may exist a new many-particle system consisting of electron pairs and holes. Furthermore, we calculate the charge-density excitation spectrum in this new many-particle system.