LaMnO$_3$ is a Mott Insulator: an precise definition and an evaluation of the local interaction strength

Chungwei Lin; Andrew. J. Millis

LaMnO$_3$ is a Mott Insulator: an precise definition and an evaluation of the local interaction strength

Strongly Correlated Electrons 2008-10-24 v2

Authors: Chungwei Lin , Andrew. J. Millis

Abstract

We compare the interaction parameters measured on LaMnO $_3$ to single site dynamical mean field estimates of the critical correlation strength needed to drive a Mott transition, finding that the total correlation strength (electron-electron plus electron-lattice) is very close to but slightly larger than the critical value, while if the electron lattice interaction is neglected the model is metallic. Our results emphasize the importance of additional physics including the buckling of the Mn-O-Mn bonds.

Keywords

mott insulator lanthanum manganite dynamical mean field theory electron-lattice interaction correlation strength mott transition

Cite

@article{arxiv.0808.0733,
  title  = {LaMnO$_3$ is a Mott Insulator: an precise definition and an evaluation of the local interaction strength},
  author = {Chungwei Lin and Andrew. J. Millis},
  journal= {arXiv preprint arXiv:0808.0733},
  year   = {2008}
}

Comments

2 figures, 9 pages, using the bandwidth with the observed structure in this version

Related papers

View all related →