title: Lattice and polarizability mediated spin activity in EuTiO3.
abstract: EuTiO3 is shown to exhibit novel strong spin-charge-lattice coupling deep in the paramagnetic phase. Its existence is evidenced by an, until now, unknown response of the paramagnetic susceptibility at temperatures exceeding the structural phase transition temperature T(S) = 282 K. The 'extra' features in the susceptibility follow the rotational soft zone boundary mode temperature dependence above and below TS. The theoretical modeling consistently reproduces this behavior and provides reasoning for the stabilization of the soft optic mode other than quantum fluctuations.
authors.affiliation: Max Planck Institute for Solid State Research, Heisenbergstraße 1, D-70569 Stuttgart, Germany. Brock University, 500 Glenridge Avenue, St Catharines L2S-3A1, ON, Canada.
authors.forename: K
authors.initials: K
authors.lastname: Caslin
authors.forename: R K
authors.initials: RK
authors.lastname: Kremer
authors.forename: Z
authors.initials: Z
authors.lastname: Guguchia
authors.forename: H
authors.initials: H
authors.lastname: Keller
authors.forename: J
authors.initials: J
authors.lastname: Köhler
authors.forename: A
authors.initials: A
authors.lastname: Bussmann-Holder