Pressure-Induced Metal-Insulator Transition inLaMnO3Is Not of Mott-Hubbard Type

2006/02/28 by A. Yamasaki, M. Feldbacher, Yi‐feng Yang +4 · 3 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Physics #Rare-earth and actinide compounds #cond-mat.mtrl-sci #cond-mat.str-el

paper · pdf · doi:10.1103/physrevlett.96.166401

published as Phys. Rev. Lett. 96, 166401 (2006) · 4 pages, 3 figures

openalex publication_date 2006/04/27 · arxiv created 2006/05/02 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Calculations employing the local density approximation combined with static and dynamical mean field theories (LDA+U and LDA+DMFT) indicate that the metal-insulator transition observed at 32 GPa in paramagnetic LaMnO3 at room temperature is not a Mott-Hubbard transition, but is caused by orbital splitting of the majority-spin eg bands. For LaMnO3 to be insulating at pressures below 32 GPa, both on-site Coulomb repulsion and Jahn-Teller distortion are needed.

Citations

• Giant negative magnetoresistance in perovskitelikeLa2/3Ba1/3MnOxferromagnetic films
• Muffin-tin orbitals of arbitrary order
• Orbital Ordering inLaMnO3: Electron-Electron versus Electron-Lattice Interactions
• Thousandfold Change in Resistivity in Magnetoresistive La-Ca-Mn-O Films
• Mott Transition and Suppression of Orbital Fluctuations in Orthorhombic3d1Perovskites
• Maximally-localized generalized Wannier functions for composite energy bands

Cited by

• Low-energy Mott-Hubbard excitations inLaMnO3probed by optical ellipsometry
• Linear-scaling DFT + Uwith full local orbital optimization
• Percolative metal-insulator transition inLaMnO3