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- W2000267910 abstract "The optical conductivity σ(ω) is calculated for CuC2 chain clusters at finite temperature T within a pd-Hubbard model. Data at T = 300 K for Li2CuO2 are reanalyzed within this approach. The relative weights of ZhangRice singlet (ZRS) and triplet charge excitations near 2.5 and 4 eV, respectively, depend strongly on T at low temperature, and a dramatic dependenc of σ(ω) on the ratio of the 1st to 2nd neighbor exchange integrals is predicted. Infomation about exchange interactions for edge-shared cuprates can be btained from Tdependent optical pectra at higher T. A reduced intensity of the ZRStansition with increasing T is also relevant for unfustated cuprates in general." @default.
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- W2000267910 date "2009-03-01" @default.
- W2000267910 modified "2023-09-27" @default.
- W2000267910 title "Low-temperature pecularities of the optical response in undoped cuprates" @default.
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- W2000267910 doi "https://doi.org/10.1088/1742-6596/150/4/042026" @default.
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