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Hole Depletion of Ladders in Sr14Cu24O41 induced by Correlation Effects (CROSBI ID 192824)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Ilakovac, Vita ; Gougoussis, C. ; Calandra, M. ; Brookes, N.B. ; Bisogni, V. ; Chiuzbaian, S.G. ; Akimitsu, J. ; Milat, Ognjen ; Tomic, Silvia ; Hague C.F. Hole Depletion of Ladders in Sr14Cu24O41 induced by Correlation Effects // Physical review. B, Condensed matter and materials physics, 85 (2012), 075108-1-075108-6. doi: 10.1103/PhysRevB.85.075108

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

Povezanost rada

Fizika

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