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Evidence of two-dimensional superconductivity in the single crystalline nanohybrid of organic-bismuth cuprate

Title
Evidence of two-dimensional superconductivity in the single crystalline nanohybrid of organic-bismuth cuprate
Authors
Chung I.-W.Kwon S.-J.Kim S.-J.Jang E.S.Hwang S.-J.Choy J.-H.
Ewha Authors
최진호황성주
SCOPUS Author ID
최진호scopus; 황성주scopus
Issue Date
2006
Journal Title
Journal of Physical Chemistry B
ISSN
1520-6106JCR Link
Citation
vol. 110, no. 33, pp. 16197 - 16200
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
A coordination compound of HgI2(pyridine)2 can be successfully intercalated into a single crystalline Bi2-Sr 2CaCu2Oy, high-Tc superconductor through an interlayer complexation reaction between pyridine molecules and bismuth cuprate pre-intercalated with mercuric iodide. X-ray diffraction and X-ray absorption spectroscopic results clearly demonstrate that the single crystalline nature of the pristine bismuth cuprate remains unchanged even after the intercalation of organic complex as well as those of iodine and mercuric iodide. According to the angle-dependent dc magnetization measurements, the intercalation of bulky organic molecules completely blocks superconductive currents along the c-axis, whereas a superconducting transition along the in-plane direction still occurs in the organic intercalate. In the case of the iodine or mercuric iodide intercalates with smaller lattice expansions, an out-of-plane diamagnetic transition is not wholly quenched but significantly depressed by the intercalation, confirming the reduction of interlayer interaction. The present finding can provide straightforward evidence of the two-dimensionality of high temperature superconductivity in the present cuprate-based nanohybrid material. © 2006 American Chemical Society.
DOI
10.1021/jp0632945
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자연과학대학 > 화학·나노과학전공 > Journal papers
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