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dc.contributor.authorChelwani, N.-
dc.contributor.authorBaum, A.-
dc.contributor.authorBöhm, T.-
dc.contributor.authorOpel, M.-
dc.contributor.authorVenturini, Francesca-
dc.contributor.authorTassini, L.-
dc.contributor.authorErb, A.-
dc.contributor.authorBerger, H.-
dc.contributor.authorForró, L.-
dc.contributor.authorHackl, R.-
dc.date.accessioned2018-01-18T10:54:41Z-
dc.date.available2018-01-18T10:54:41Z-
dc.date.issued2018-01-09-
dc.identifier.issn2469-9950de_CH
dc.identifier.issn2469-9969de_CH
dc.identifier.urihttps://digitalcollection.zhaw.ch/handle/11475/2120-
dc.description.abstractWe present results from light scattering experiments on three insulating antiferromagnetic cuprates, YBa2Cu3O6.05, Bi2Sr2YCu2O8+δ, and La2CuO4 as a function of polarization and excitation energy using samples of the latest generation. From the raw data we derive symmetry-resolved spectra. The spectral shape in B1g symmetry is found to be nearly universal and independent of excitation energy. The spectra agree quantitatively with predictions by field theory [Eur. Phys. J. B 88, 237 (2015)] facilitating the precise extraction of the Heisenberg coupling J. In addition, the asymmetric lineshape on the high-energy side is found to be related to amplitude fluctuations of the magnetization. In La2CuO4 alone, minor contributions from resonance effects may be identified. The spectra in the other symmetries are not universal. The variations may be traced back to weak resonance effects and extrinsic contributions. For all three compounds we find support for the existence of chiral excitations appearing as a continuum in A2g symmetry having an onset slightly below 3J. In La2CuO4 an additional isolated excitation appears on top of the A2g continuum.de_CH
dc.language.isoende_CH
dc.publisherAmerican Physical Societyde_CH
dc.relation.ispartofPhysical Review Bde_CH
dc.rightsLicence according to publishing contractde_CH
dc.subject.ddc530: Physikde_CH
dc.titleMagnetic excitations and amplitude fluctuations in insulating cupratesde_CH
dc.typeBeitrag in wissenschaftlicher Zeitschriftde_CH
dcterms.typeTextde_CH
zhaw.departementSchool of Engineeringde_CH
zhaw.organisationalunitInstitut für Angewandte Mathematik und Physik (IAMP)de_CH
dc.identifier.doi10.1103/PhysRevB.97.024407de_CH
zhaw.funding.euNode_CH
zhaw.issue2de_CH
zhaw.originated.zhawYesde_CH
zhaw.publication.statuspublishedVersionde_CH
zhaw.volume97de_CH
zhaw.publication.reviewPeer review (Publikation)de_CH
Appears in Collections:Publikationen School of Engineering

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