2004/08/09 by R. Y. Gu
Materials Science · Mathematics · Physics and Astronomy · #Advanced Condensed Matter Physics #Colossal magnetoresistance #Condensed matter physics #Electrical resistivity and conductivity #Electronic and Structural Properties of Oxides #Exchange interaction #Ferromagnetism #Geometry #Insulator (electricity) #Inverse #Lattice (music) #Magnetic and transport properties of perovskites and related materials #Magnetic field #Magnetoresistance #Materials science #Mathematics #Metal–insulator transition #Physics #Quantum mechanics #Transfer matrix #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.70.184444
4 figures
arxiv created 2004/08/09 · openalex publication_date 2004/11/30 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Taking into account both the Jahn-Teller lattice distortion and the on-site electronic potential fluctuations in the orbital-degenerated double-exchange model, in which both the core-spin and the lattice distortion are treated classically, we investigate theoretically the metal-insulator transition (MIT) in manganites by considering the electronic localization effect. An inverse matrix method is developed for calculation in which we use the inverse of the transfer matrix to obtain the localization length. We find that within reasonable range of parameters, both the lattice effect and the potential fluctuation are responsible to the occurrence of the MIT. The role of the orbital configuration is also discussed.