Origin of the metallization of c-axis resistivity upon iodine intercalation into Bi2Sr2CaCu2O8+delta
SCIE
SCOPUS
- Title
- Origin of the metallization of c-axis resistivity upon iodine intercalation into Bi2Sr2CaCu2O8+delta
- Authors
- Choy, JH; Hwang, SJ; Hwang, SH; Lee, W; Jung, D; Lee, M; Lee, HJ
- Date Issued
- 2001-06-07
- Publisher
- AMER CHEMICAL SOC
- Abstract
- The origin of the metallization of c-axis resistivity upon intercalation of iodine into Bi2Sr2CaCu2O8+delta has been studied by performing I L-I-edge angle-resolved X-ray absorption spectroscopic (XAS) analysis and the tight binding band calculation with the extended Huckel method. According to the polarized I LI-edge XAS analysis, it has become clear that there is a significant anisotropy in the I 5p hole distribution of the intercalated iodine layer. Compared to the E perpendicular toc spectrum, the E//c spectrum shows weaker intensity and higher energy for the white line feature corresponding to the 2s --> 5p(z) transition, indicative of a strong interaction between the BiO layer and the intercalated iodine molecule along the c-axis, Such an interpretation is further supported by the band calculation results showing a significant hybridization between the Bi 6s orbital and the I 5p(z) one. On the basis of these findings, it is concluded that the orbital overlap between Bi 6s and I 5p(z) opens a conduction channel along the c-axis, which leads to the metallization of out-of-plane resistivity upon iodine intercalation.
- Keywords
- COPPER-OXIDE SUPERCONDUCTORS; SINGLE-CRYSTALS; IBI2SR2CACU2OY; TENSOR; STATE
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/19517
- DOI
- 10.1021/jp010501m
- ISSN
- 1089-5647
- Article Type
- Article
- Citation
- JOURNAL OF PHYSICAL CHEMISTRY B, vol. 105, no. 22, page. 5174 - 5177, 2001-06-07
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