Spin-gap evolution upon Ca doping in the spin-ladder series Sr(14−x)CaxCu24O41 studied by inelastic neutron scattering

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dc.contributor.authorDeng, Gen_AU
dc.contributor.authorTsyrulin, Nen_AU
dc.contributor.authorBourges, Pen_AU
dc.contributor.authorLamago, Den_AU
dc.contributor.authorRønnow, HMen_AU
dc.contributor.authorKenzelmann, Men_AU
dc.contributor.authorDanilkin, SAen_AU
dc.contributor.authorPomjakushina, Een_AU
dc.contributor.authorConder, Ken_AU
dc.date.accessioned2013-11-08T05:53:59Zen_AU
dc.date.available2013-11-08T05:53:59Zen_AU
dc.date.issued2013-07-03en_AU
dc.date.statistics2013-10-08en_AU
dc.description.abstractThe spin-gap evolution upon Ca doping in Sr14-xCaxCu24O41 was systematically investigated using inelastic neutron scattering. We discover that the singlet-triplet spin-gap excitation survives in this series with x up to 13, indicating the singlet dimer ground state in these compounds. This observation corrects the previous speculation that the spin gap collapses at x similar to 13 by the NMR technique. The strong intensity modulation along Q(H) in x = 0 gradually evolves into a Q-independent feature in x > 11. This could be attributed to the localized Cu moment magnetism developing into an itinerant magnetism with increasing x. It is a surprise that the spin gap persists in the normal state of this spin-ladder system with metallic behavior, which evidences the possibility of magnetically mediated carrier pairing mechanism in a two-leg spin-ladder lattice. © 2013, American Physical Society.en_AU
dc.identifier.articlenumber014504en_AU
dc.identifier.citationDeng, G., Tsyrulin, N., Bourges, P., Lamago, D., Ronnow, H., Kenzelmann, M., Danilkin, S., Pomjakushina, E., & Conder, K. (2013). Spin-gap evolution upon Ca doping in the spin-ladder series Sr(14−x)CaxCu24O41 studied by inelastic neutron scattering. Physical Review B, 88 (1), 014504. doi:10.1103/PhysRevB.88.014504en_AU
dc.identifier.govdoc5078en_AU
dc.identifier.issn1098-0121en_AU
dc.identifier.issue1en_AU
dc.identifier.journaltitlePhysical Review Ben_AU
dc.identifier.urihttp://dx.doi.org/10.1103/PhysRevB.88.014504en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/4911en_AU
dc.identifier.volume88en_AU
dc.language.isoenen_AU
dc.publisherAmerical Physical Societyen_AU
dc.subjectCalciumen_AU
dc.subjectCopperen_AU
dc.subjectStrontiumen_AU
dc.subjectNeutronsen_AU
dc.subjectScatteringen_AU
dc.subjectSpinen_AU
dc.titleSpin-gap evolution upon Ca doping in the spin-ladder series Sr(14−x)CaxCu24O41 studied by inelastic neutron scatteringen_AU
dc.typeJournal Articleen_AU
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