Orbital order, stacking defects and spin-fluctuations in the $p$-electron molecular solid RbO$_2$

Details Orbital order, stacking defects and spin-fluctuations in the $p$-electron molecular solid RbO$_2$ Orbital order, stacking defects and spin-fluctuations in the $p$-electron molecular solid RbO$_2$

2009-12-11

arxiv.org/abs/0912.2334v2

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 2 figures

Scientific paper

We examine magnon and orbiton behavior in localized O$_2$ anti-bonding molecular $\pi^*$ orbitals using an effective Kugel-Khomskii Hamiltonian derived from a two band Hubbard model with hopping parameters taken from {\em ab initio} density functional calculations. The considerable difference between intraband and interband hoppings leads to a strong coupling between the spin wave dispersion and the orbital ground state, providing a straightforward way of experimentally determining the orbital ground state from the measured magnon dispersion. The near degeneracy of different orbital ordered states leads to stacking defects which further modulate spin-fluctuation spectra. Proliferation of orbital domains disrupts long-range magnetic order, thus causing a significant reduction in the observed N\'eel temperature.

Affiliated with

Also associated with

No associations

Rating

Orbital order, stacking defects and spin-fluctuations in the $p$-electron molecular solid RbO$_2$ does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Orbital order, stacking defects and spin-fluctuations in the $p$-electron molecular solid RbO$_2$, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Orbital order, stacking defects and spin-fluctuations in the $p$-electron molecular solid RbO$_2$ will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-532637