2014/06/12 by Shuichiro Hirai, S. Hirai, Y. Goto +14
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #FOS: Physical sciences #Magnetic and transport properties of perovskites and related materials #Materials Science (cond-mat.mtrl-sci) #Multiferroics and related materials #Strongly Correlated Electrons (cond-mat.str-el) #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.48550/arxiv.1406.4486
6 pages, 9 figures
arxiv created 2014/06/12 · openalex publication_date 2014/06/12 · arxiv updated 2014/06/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Mn3O4 is a spin frustrated magnet that adopts a tetragonally distorted spinel structure at ambient conditions and a CaMn2O4-type postspinel structure at high pressure. We conducted both optical measurements and ab initio calculations, and systematically studied the electronic band structures of both the spinel and postspinel Mn3O4 phases. For both phases, theoretical electronic structures are consistent with the optical absorption spectra, and display characteristic band-splitting of the conduction band. The band gap obtained from the absorption spectra is 1.91(6) eV for the spinel phase, and 0.94(2) eV for the postspinel phase. Both phases are charge-transfer type insulators. The Mn 3d t2g and O 2p form antibonding orbitals situated at the conduction band with higher energy.