Orbital ordering in undoped manganites via a generalized Peierls instability

Abstract

We study the ground state orbital ordering of $LaMn{O}_3$, at weak electron-phonon coupling, when the spin state is A-type antiferromagnet. We determine the orbital ordering by extending to our Jahn-Teller system a recently developed Peierls instability framework for the Holstein model [1]. By using two-dimensional dynamic response functions corresponding to a mixed Jahn-Teller mode, we establish that the $Q_2$ mode determines the orbital order.

A few changes made. Accepted in Phys. Rev. B

References in corpus (8)

• Sliding charge density wave in manganites
• Weak charge-lattice coupling requires reinterpretation of stripes of charge order in La1-xCaxMnO3
• Re-examination of orbital ordering in LaMnO${}_3$: Electron-electron and electron-lattice interactions
• Charge Ordering Fluctuation and Optical Pseudogap in La${}_{1-x}$Ca${}_x$MnO${}_3$
• Orbital ordering in manganites in the band approach
• Strain control of superlattice implies weak charge-lattice coupling in La${}_{0.5}$Ca${}_{0.5}$MnO${}_3$
• Theoretical Description of Pseudocubic Manganites
• Phase transition and phase diagram at a general filling in the spinless one-dimensional Holstein Model

Cited by in corpus (2)

• Relationship between orbital structure and lattice distortions: CE phase of manganites, revisited
• Bridging charge-orbital ordering and Fermi surface instabilities in half-doped single-layered manganite La_0.5Sr_1.5MnO_4