Hole Depletion of Ladders in Sr14Cu24O41 induced by Correlation Effects (CROSBI ID 192824)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Ilakovac, Vita ; Gougoussis, C. ; Calandra, M. ; Brookes, N.B. ; Bisogni, V. ; Chiuzbaian, S.G. ; Akimitsu, J. ; Milat, Ognjen ; Tomic, Silvia ; Hague C.F.
engleski
Hole Depletion of Ladders in Sr14Cu24O41 induced by Correlation Effects
The hole distribution in Sr14Cu24 is studied by low-temperature polarization-dependent O K near-edge x-ray absorption fine-structure measurements and state-of-the-art electronic structure calculations that include core-hole and correlation effects in a mean-field approach. Contrary to all previous analysis, based on semiempirical models, we show that correlations and antiferromagnetic ordering favor the chain-hole attraction. For the remaining small number of holes accomodated on ladders, leg sites are preferred to rung sites. The small hole affinity of rung sites explains naturally the one-dimensional to two-dimensional crossover in the phase diagram of (la, Y, Sr, Ca)14Cu24O41.
spin ladders; correlation effects; NEXAFS; hole distribution
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Podaci o izdanju
85
2012.
075108-1-075108-6
objavljeno
1098-0121
10.1103/PhysRevB.85.075108