Two energy scales in the spin excitations of the high-T_c superconductor La$_{2-x}$Sr$_{x}$CuO$_{4}$

Simple item page
dc.creatorVignolle, B.
dc.creatorHayden, S. M.
dc.creatorMcMorrow, D. F.
dc.creatorRonnow, H. M.
dc.creatorLake, B.
dc.creatorFrost, C. D.
dc.creatorPerring, T. G.
dc.date2007-01-08
dc.date2007-01-08
dc.date.accessioned2026-07-07T07:51:48Z
dc.date.available2026-07-07T07:51:48Z
dc.descriptionThe excitations responsible for producing high-temperature superconductivity in the cuprates have not been identified. Two promising candidates are collective spin excitations and phonons. A recent argument against spin excitations has been their inability to explain structures seen in electronic spectroscopies such as photoemission and tunnelling. Here we use inelastic neutron scattering to demonstrate that collective spin excitations in optimally doped La$_{2-x}$Sr$_{x}$CuO$_{4}$ are more structured than previously thought. The excitations have a two component structure with a low-frequency component strongest around 18 meV and a broader component strongest near 40-70 meV. The second component carries most of the spectral weight and its energy matches structure seen in photoemission and tunnelling spectra in the range 50-90 meV. Our results demonstrate that collective spin excitations can explain features of quasiparticle spectroscopies and are therefore likely to be the strongest coupled excitations.
dc.descriptionaccepted for publication in Nature Physics, original submission
dc.identifierhttps://arxiv.org/abs/cond-mat/0701151
dc.identifierhttp://arxiv.org/abs/cond-mat/0701151
dc.identifierNature Physics 3, 163 (2007)
dc.identifierdoi:10.1038/nphys546
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/125651
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleTwo energy scales in the spin excitations of the high-T_c superconductor La$_{2-x}$Sr$_{x}$CuO$_{4}$
dc.typetext

Files

Collections

arXiv