Güthoff, Friedrich

[["dc.bibliographiccitation.artnumber","105013"],["dc.bibliographiccitation.issue","10"],["dc.bibliographiccitation.journal","Materials Research Express"],["dc.bibliographiccitation.volume","2"],["dc.contributor.affiliation","Güthoff, F;"],["dc.contributor.affiliation","Zhang, B;"],["dc.contributor.affiliation","Eckold, G;"],["dc.contributor.author","Guethoff, Friedrich"],["dc.contributor.author","Zhang, B."],["dc.contributor.author","Eckold, Goetz"],["dc.date.accessioned","2018-11-07T09:50:24Z"],["dc.date.available","2018-11-07T09:50:24Z"],["dc.date.issued","2015"],["dc.date.updated","2022-02-09T13:18:42Z"],["dc.description.abstract","In quasi binary systems like AgBr-NaBr the demixing from the homogeneous high temperature phase into separated phases is a complex process that depends on the ageing temperature as well as on the quench rate. Spinodal decomposition and nucleation processes can be distinguished which lead, however, to the same final equilibrium state. Using frequency modulated scanning force microscopy we aimed to distinguish the demixed phases and their morphologies on a nm-scale at room temperature for samples with different concentration. While no contrast between the different phases are observed in the usual topographic mode, a modified evaluation of Kelvin experiments allows the distinction of silver-and sodium enriched phases. Moreover, direct evidence is found for concentration fluctuations which are characteristic for spinodal decomposition."],["dc.identifier.doi","10.1088/2053-1591/2/10/105013"],["dc.identifier.eissn","2053-1591"],["dc.identifier.isi","000370058600013"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/13118"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/35704"],["dc.language.iso","en"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","IOP Publishing"],["dc.relation.issn","2053-1591"],["dc.rights.access","openAccess"],["dc.rights.uri","http://creativecommons.org/licenses/by/3.0/"],["dc.title","Imaging chemical concentration pattern and early stages of spinodal decomposition in the AgxNa1-xBr system by scanning force microscopy"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","2003524"],["dc.bibliographiccitation.journal","Advanced Science"],["dc.contributor.author","Weber, Niklas A."],["dc.contributor.author","Schmidt, Hendrik"],["dc.contributor.author","Sievert, Tim"],["dc.contributor.author","Jooss, Christian"],["dc.contributor.author","Güthoff, Friedrich"],["dc.contributor.author","Moshneaga, Vasily"],["dc.contributor.author","Samwer, Konrad"],["dc.contributor.author","Krüger, Matthias"],["dc.contributor.author","Volkert, Cynthia A."],["dc.date.accessioned","2021-04-14T08:29:31Z"],["dc.date.available","2021-04-14T08:29:31Z"],["dc.date.issued","2021"],["dc.description.abstract","Despite the huge importance of friction in regulating movement in all natural and technological processes, the mechanisms underlying dissipation at a sliding contact are still a matter of debate. Attempts to explain the dependence of measured frictional losses at nanoscale contacts on the electronic degrees of freedom of the surrounding materials have so far been controversial. Here, it is proposed that friction can be explained by considering the damping of stick-slip pulses in a sliding contact. Based on friction force microscopy studies of La(1−x)SrxMnO3 films at the ferromagnetic-metallic to a paramagnetic-polaronic conductor phase transition, it is confirmed that the sliding contact generates thermally-activated slip pulses in the nanoscale contact, and argued that these are damped by direct coupling into the phonon bath. Electron-phonon coupling leads to the formation of Jahn–Teller polarons and to a clear increase in friction in the high-temperature phase. There is neither evidence for direct electronic drag on the atomic force microscope tip nor any indication of contributions from electrostatic forces. This intuitive scenario, that friction is governed by the damping of surface vibrational excitations, provides a basis for reconciling controversies in literature studies as well as suggesting possible tactics for controlling friction."],["dc.identifier.doi","10.1002/advs.202003524"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/82923"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-399"],["dc.relation","SFB 1073: Kontrolle von Energiewandlung auf atomaren Skalen"],["dc.relation","SFB 1073 | Topical Area A | A01 Reibung unter aktiver Kontrolle in Systemen mit optimierten Freiheitsgraden"],["dc.relation","SFB 1073 | Topical Area C | C02 In situ hochauflösende Untersuchung des aktiven Zustands bei der photo- und elektrochemischen Wasserspaltung"],["dc.relation","SFB 1073 | Topical Area A: Control of dissipation"],["dc.relation.eissn","2198-3844"],["dc.relation.issn","2198-3844"],["dc.relation.orgunit","Institut für Materialphysik"],["dc.rights","CC BY 4.0"],["dc.title","Polaronic Contributions to Friction in a Manganite Thin Film"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]