000228704 001__ 228704
000228704 005__ 20181203024724.0
000228704 0247_ $$2doi$$a10.1103/PhysRevLett.118.176404
000228704 022__ $$a0031-9007
000228704 02470 $$2ISI$$a000400241400006
000228704 037__ $$aARTICLE
000228704 245__ $$aElectronic Phase Separation and Dramatic Inverse Band Renormalization in the Mixed-Valence Cuprate LiCu2O2
000228704 260__ $$aCollege Pk$$bAmer Physical Soc$$c2017
000228704 269__ $$a2017
000228704 300__ $$a5
000228704 336__ $$aJournal Articles
000228704 520__ $$aWe measured, by angle-resolved photoemission spectroscopy, the electronic structure of LiCu2O2, a mixed-valence cuprate where planes of Cu(I) (3d(10)) ions are sandwiched between layers containing one-dimensional edge-sharing Cu(II) (3d(9)) chains. We find that the Cu(I)- and Cu(II)-derived electronic states form separate electronic subsystems, in spite of being coupled by bridging O ions. The valence band, of the Cu(I) character, disperses within the charge-transfer gap of the strongly correlated Cu(II) states, displaying an unprecedented 250% broadening of the bandwidth with respect to the predictions of density functional theory. Our observation is at odds with the widely accepted tenet of many-body theory that correlation effects generally yield narrower bands and larger electron masses and suggests that present-day electronic structure techniques provide an intrinsically inappropriate description of ligand-to-d hybridizations in late transition metal oxides.
000228704 700__ $$0244129$$aMoser, S.$$g204418$$uEcole Polytech Fed Lausanne, Inst Phys, CH-1015 Lausanne, Switzerland
000228704 700__ $$aNomura, Y.$$uEcole Polytech Fed Lausanne, Inst Phys, CH-1015 Lausanne, Switzerland
000228704 700__ $$0245078$$aMoreschini, L.$$g168489$$uALS, Berkeley, CA 94720 USA
000228704 700__ $$0249921$$aGatti, G.$$g257763$$uEcole Polytech Fed Lausanne, Inst Phys, CH-1015 Lausanne, Switzerland
000228704 700__ $$0240360$$aBerger, H.$$g104502$$uEcole Polytech Fed Lausanne, Inst Phys, CH-1015 Lausanne, Switzerland
000228704 700__ $$aBugnon, P.$$uEcole Polytech Fed Lausanne, Inst Phys, CH-1015 Lausanne, Switzerland
000228704 700__ $$aMagrez, A.$$uEcole Polytech Fed Lausanne, Inst Phys, CH-1015 Lausanne, Switzerland
000228704 700__ $$aJozwiak, C.$$uALS, Berkeley, CA 94720 USA
000228704 700__ $$aBostwick, A.$$uALS, Berkeley, CA 94720 USA
000228704 700__ $$aRotenberg, E.$$uALS, Berkeley, CA 94720 USA
000228704 700__ $$aBiermann, S.$$uUniv Paris Saclay, Ecole Polytech, CNRS UMR7644, Ctr Phys Thwor, F-91128 Palaiseau, France
000228704 700__ $$0241501$$aGrioni, M.$$g107920$$uEcole Polytech Fed Lausanne, Inst Phys, CH-1015 Lausanne, Switzerland
000228704 773__ $$j118$$k17$$q176404$$tPhysical Review Letters
000228704 909C0 $$0252170$$pLSE$$xU10153
000228704 909CO $$ooai:infoscience.tind.io:228704$$pSB$$particle
000228704 917Z8 $$x107920
000228704 937__ $$aEPFL-ARTICLE-228704
000228704 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000228704 980__ $$aARTICLE