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__ $$aElectronic Phase Separation and Dramatic Inverse Band Renormalization in the Mixed-Valence Cuprate LiCu2O2
000228704 260__ $$bAmer Physical Soc$$c2017$$aCollege Pk
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__ $$0244129$$g204418$$uEcole Polytech Fed Lausanne, Inst Phys, CH-1015 Lausanne, Switzerland$$aMoser, S.
000228704 700__ $$uEcole Polytech Fed Lausanne, Inst Phys, CH-1015 Lausanne, Switzerland$$aNomura, Y.
000228704 700__ $$0245078$$g168489$$uALS, Berkeley, CA 94720 USA$$aMoreschini, L.
000228704 700__ $$0249921$$g257763$$uEcole Polytech Fed Lausanne, Inst Phys, CH-1015 Lausanne, Switzerland$$aGatti, G.
000228704 700__ $$0240360$$g104502$$uEcole Polytech Fed Lausanne, Inst Phys, CH-1015 Lausanne, Switzerland$$aBerger, H.
000228704 700__ $$uEcole Polytech Fed Lausanne, Inst Phys, CH-1015 Lausanne, Switzerland$$aBugnon, P.
000228704 700__ $$uEcole Polytech Fed Lausanne, Inst Phys, CH-1015 Lausanne, Switzerland$$aMagrez, A.
000228704 700__ $$uALS, Berkeley, CA 94720 USA$$aJozwiak, C.
000228704 700__ $$uALS, Berkeley, CA 94720 USA$$aBostwick, A.
000228704 700__ $$uALS, Berkeley, CA 94720 USA$$aRotenberg, E.
000228704 700__ $$aBiermann, S.$$uUniv Paris Saclay, Ecole Polytech, CNRS UMR7644, Ctr Phys Thwor, F-91128 Palaiseau, France
000228704 700__ $$aGrioni, M.$$uEcole Polytech Fed Lausanne, Inst Phys, CH-1015 Lausanne, Switzerland$$g107920$$0241501
000228704 773__ $$j118$$tPhysical Review Letters$$k17$$q176404
000228704 909C0 $$xU10153$$0252170$$pLSE
000228704 909CO $$pSB$$particle$$ooai:infoscience.tind.io:228704
000228704 917Z8 $$x107920
000228704 937__ $$aEPFL-ARTICLE-228704
000228704 973__ $$rREVIEWED$$sPUBLISHED$$aEPFL
000228704 980__ $$aARTICLE