Dynamical disorder of spin-induced Jahn-Teller orbitals with the insulator-metal transition in cobaltates
| dc.creator | Louca, Despina | |
| dc.creator | Sarrao, J. L. | |
| dc.date | 2003-08-27 | |
| dc.date.accessioned | 2026-07-07T02:53:09Z | |
| dc.date.available | 2026-07-07T02:53:09Z | |
| dc.description | Using elastic and inelastic neutron scattering, we investigated the evolution of the local atomic structure and lattice dynamics of La(1-x)Sr(x)CoO3 (x=0-0.5) as it crosses over with x from an insulator to a ferromagnetic metal (FMM). Our pair density function analysis indicates that in the paramagnetic insulating (PMI) phase for all x, spin activation of Co3+ ions induces local static Jahn-Teller (JT) distortions. The size of the JT lattice increases almost linearly with x. However, in the FMM phase, static JT distortions are absent for x <= 30 %. This coincides with narrowing of hw=22 and 24 meV modes in the phonon spectrum in which we argue is due to localized dynamical JT fluctuations. For x > 30%, static JT distortions reappear along with broadening of the phonon modes because of weakened charge-lattice interactions. | |
| dc.description | 9 pages, 4 figures, paper has been accepted for publication in Phys. Rev. Lett | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0308586 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0308586 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/22104 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.subject | Materials Science | |
| dc.title | Dynamical disorder of spin-induced Jahn-Teller orbitals with the insulator-metal transition in cobaltates | |
| dc.type | text |