title: Elastic coupling between nonferroelastic domain walls.
abstract: We reveal a strong elastic interaction between nonferroelastic domain walls in ferroelectric thin films. This interaction, having no analogue in bulk materials, is governed by elastic fields that are associated with the domain walls and extends to distances comparable to the film thickness. Such elastic widening of the nonferroelastic domain walls is shown to be particularly strong in common ferroelectric perovskites. The results are especially relevant for the control of domain wall propagation and the understanding of polarization dynamics.
authors.affiliation: Ceramics Laboratory, Swiss Federal Institute of Technology (EPFL), CH-1015 Lausanne, Switzerland.
authors.forename: K
authors.initials: K
authors.lastname: Shapovalov
authors.affiliation: Ceramics Laboratory, Swiss Federal Institute of Technology (EPFL), CH-1015 Lausanne, Switzerland.
authors.forename: P V
authors.initials: PV
authors.lastname: Yudin
authors.affiliation: Ceramics Laboratory, Swiss Federal Institute of Technology (EPFL), CH-1015 Lausanne, Switzerland.
authors.forename: A K
authors.initials: AK
authors.lastname: Tagantsev
authors.affiliation: Institute for Problems of Materials Science, National Academy of Sciences of Ukraine, ulitsa Krjijanovskogo, 3, UA-03142 Kiev, Ukraine.
authors.forename: E A
authors.initials: EA
authors.lastname: Eliseev
authors.affiliation: Institute of Physics, National Academy of Sciences of Ukraine, prospekt Nauki, 46, UA-03028 Kiev, Ukraine.
authors.forename: A N
authors.initials: AN
authors.lastname: Morozovska
authors.affiliation: Ceramics Laboratory, Swiss Federal Institute of Technology (EPFL), CH-1015 Lausanne, Switzerland.
authors.forename: N
authors.initials: N
authors.lastname: Setter