Charge order induced in an orbital density-wave state

Abstract

Motivated by the recent ARPES measurements (Evtushinsky et. al., PRL {\bf 105}, 147201 (2010)) and evidence for the density-wave state for the charge and orbital ordering (García et al., PRL {\bf 109}, 107202 (2012)) in La${}_{0.5}$Sr${}_{1.5}$MnO${}_4$, the issue of charge and orbital ordering in a two orbital tight-binding model for layered manganite near half doping is revisited. We find that the charge order with an ordering wavevector 2$\mathbf{Q}$ = $(\pi ,\pi )$ is induced by the orbital order of $B_{1g}$ representation with a different ordering wavevector $\mathbf{Q}$, where the primary order parameter results from the strong Fermi-surface nesting. The orbital and charge order parameters develop according to $\sqrt{T_{CO}-T}$ and $T_{CO}-T$, respectively, by decreasing the temperature below the orbital ordering temperature $T_{CO}$. Moreover, the orbital order is found to stabilize the CE-type spin arrangement observed experimentally below $T_{CE}<T_{CO}$.

References in corpus (5)

• Orbital order in La0.5Sr1.5MnO4: beyond a common local Jahn-Teller picture
• Ferromagnetic zigzag chains and properties of the charge ordered perovskite manganites
• Relationship between orbital structure and lattice distortions: CE phase of manganites, revisited
• Theory for charge and orbital density-wave states in manganite La${}_{0.5}$Sr${}_{1.5}$MnO${}_4$
• Orbital ordering transition in the single-layer manganites near half doping: a weak-coupling approach

Cited by in corpus (2)

• Highly anisotropic quasiparticle interference patterns in the spin-density wave state of the iron pnictides
• CE-antiferromagnetic electronic structure in LaSr${}_2$Mn${}_2$O${}_7$ revealed by micro-focused angle-resolved photoemission spectroscopy and tight-binding models