%0 Journal Article
%A Rusydi, A.
%A Goos, A.
%A Binder, S.
%A Eich, A.
%A Botril, K.
%A Abbamonte, P.
%A Yu, X.
%A Breese, M. B. H.
%A Eisaki, H.
%A Fujimaki, Y.
%A Uchida, S.
%A Guerassimova, N.
%A Treusch, R.
%A Feldhaus, J.
%A Reininger, R.
%A Klein, M. V.
%A Rübhausen, M.
%T Electronic Screening-Enhanced Hole Pairing in Two-Leg Spin Ladders Studied by High-Resolution Resonant Inelastic X-Ray Scattering at Cu M Edges
%J Physical review letters
%V 113
%N 6
%@ 1079-7114
%C College Park, Md.
%I APS
%M PUBDB-2015-00660
%P 067001
%D 2014
%Z OA
%X We study the electronic screening mechanisms of the effective Coulomb on-site repulsion in hole-doped Sr14Cu24O41 compared to undoped La6Ca8Cu24O41 using polarization dependent high-resolution resonant inelastic x-ray scattering at Cu M edges. By measuring the energy of the effective Coulomb on-site repulsion and the spin excitations, we estimate superexchange and hopping matrix element energies along rungs and legs, respectively. Interestingly, hole doping locally screens the Coulomb on-site repulsion reducing it by as much as 25
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000340034500009
%$ pmid:25148343
%R 10.1103/PhysRevLett.113.067001
%U https://bib-pubdb1.desy.de/record/206134