Two Ising-like magnetic excitations in a single-layer cuprate superconductor

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dc.contributor.authorLi, Yen_AU
dc.contributor.authorYu, Gen_AU
dc.contributor.authorChan, MKen_AU
dc.contributor.authorBaledent, Ven_AU
dc.contributor.authorLi, Yen_AU
dc.contributor.authorBarisic, Nen_AU
dc.contributor.authorZhao, Xen_AU
dc.contributor.authorHradil, Ken_AU
dc.contributor.authorMole, RAen_AU
dc.contributor.authorSidis, Yen_AU
dc.contributor.authorSteffens, Pen_AU
dc.contributor.authorBourges, Pen_AU
dc.contributor.authorGreven, Men_AU
dc.date.accessioned2014-05-09T01:20:12Zen_AU
dc.date.available2014-05-09T01:20:12Zen_AU
dc.date.issued2012-05-01en_AU
dc.date.statistics2014-05-09en_AU
dc.description.abstractThere exists increasing evidence that the phase diagram of the high-transition temperature (T(c)) cuprate superconductors is controlled by a quantum critical point. According to one distinct theoretical proposal, on decreasing the hole-carrier concentration a transition occurs to an ordered state with two circulating orbital currents per CuO(2) square. Below the 'pseudogap' temperature T* (T* > T(c)), the theory predicts a discrete order parameter and two weakly-dispersive magnetic excitations in structurally simple compounds which should be measurable by neutron scattering. Indeed, novel magnetic order and one such excitation were recently observed. Here, we demonstrate for tetragonal HgBa(2)CuO(4+delta) the existence of a second excitation with local character, consistent with the theory. The excitations mix with conventional antiferromagnetic fluctuations, which points towards a unifying picture of magnetism in the cuprates that will probably require a multi-band description. © 2012, Nature Publishing Group.en_AU
dc.identifier.citationLi, Y., Yu, G., Chan, M. K., Baledent, V., Li, Y., Barisic, N., Zhao, X., Hradil, K., Mole, R. A., Sidis, Y., Steffens, P., Bourges, P., & Greven, M. (2012). Two Ising-like magnetic excitations in a single-layer cuprate superconductor. Nature Physics, 8(5), 404-410. doi:10.1038/nphys2271en_AU
dc.identifier.govdoc4459en_AU
dc.identifier.issn1745-2473en_AU
dc.identifier.issue5en_AU
dc.identifier.journaltitleNature Physicsen_AU
dc.identifier.pagination404-410en_AU
dc.identifier.urihttp://dx.doi.org/10.1038/nphys2271en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/5557en_AU
dc.identifier.volume8en_AU
dc.language.isoenen_AU
dc.publisherNature Publishing Groupen_AU
dc.subjectTemperature range 0400-1000 Ken_AU
dc.subjectSuperconductorsen_AU
dc.subjectNeutronsen_AU
dc.subjectSpinen_AU
dc.subjectAntiferromagnetismen_AU
dc.subjectMagnetismen_AU
dc.titleTwo Ising-like magnetic excitations in a single-layer cuprate superconductoren_AU
dc.typeJournal Articleen_AU
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