title: Concepts for soft interfaces.
abstract: Concepts and opportunities of interfaces with soft properties are discussed. Such interfaces show a strong response to external fields. How can the interface tension which governs interfacial behavior become compatible with soft and fluctuating degrees of freedom at the interface?
authors.affiliation: Max-Planck-Institut für Eisenforschung GmbH, 40237 Düsseldorf, Germany. res314159@aol.de.
authors.forename: Reinhard
authors.identifier: http://orcid.org/0000-0002-8074-1268
authors.initials: R
authors.lastname: Sigel