2017/08/31 by Tatsuhiro Misumi, Hideo Aoki · 42 citations
Chemistry · Mathematics · Physics and Astronomy · #Advanced Condensed Matter Physics #Band gap #Chemistry #Class (philosophy) #Computer science #Condensed matter physics #Controllability #Crystallography #Electronic band structure #Ferromagnetism #Hexagonal crystal system #Interference (communication) #Mathematics #Phase (matter) #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Superconductivity #Telecommunications #Tetragonal crystal system #Topological Materials and Phenomena #cond-mat.mtrl-sci #cond-mat.supr-con #hep-lat
paper · pdf · doi:10.1103/physrevb.96.155137
published in Physical review. B./Physical review. B 96(15) (American Physical Society) · 13 pages, 14 figures; typos corrected, references added, version to appear in PRB
openalex created_date 2017/08/31 · arxiv created 2017/10/19 · openalex publication_date 2017/10/25 · arxiv updated 2017/10/27 · openalex updated_date 2026/08/05
There is an increasing fascination centered on superconductivity and topological properties with bands that are flat due to quantum mechanical interference. An important question remains: can we actually control the energy of the flat band against the dispersive ones? Here, the authors have constructed classes of models in two (or higher) dimensions in a systematic extension of the known flat bands, where the controllability provides a flat band with a tunable gap, or a flat band that pierces right through the dispersive one. While the former may favor ferromagnetism, the latter is expected to favor high-Tc superconductivity through virtual pair hopping from dispersive to flat bands.