Electronic structure of one-dimensional cuprate, Sr2CuO3

Maiti, K. ; Sarma, D. D. ; Mizokawa, T. ; Fujimori, A. (1997) Electronic structure of one-dimensional cuprate, Sr2CuO3 EPL: Europhysics Letters, 37 (5). pp. 359-364. ISSN 0295-5075

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Official URL: http://iopscience.iop.org/0295-5075/37/5/359

Related URL: http://dx.doi.org/10.1209/epl/i1997-00157-x


We investigate the electronic structure of the antiferromagnetic insulator Sr2CuO3 combining photoemission measurements and various calculations. The results suggest that the charge transfer energy, Δ , is unusually small, placing the bare upper Hubbard band within the oxygen p bandwidth, thereby implying that this compound is the first example of a correlated covalent insulator with a finite local moment.

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