Krol A, Ming ZH, Kao YH, Nücker N, Roth G, Fink J, Smith GC, Park KT, Yu J, Freeman AJ, Erband A, Müller-Vogt G, Karpinski J, Kaldis E, Schönmann K. Hole states in CuO2 planes and Cu-O chains of YBa2Cu3O7 and YBa2Cu4O8 probed by soft-x-ray absorption spectroscopy.
PHYSICAL REVIEW. B, CONDENSED MATTER 1992;
45:2581-2584. [PMID:
10001802 DOI:
10.1103/physrevb.45.2581]
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