Evidence of two-dimensional superconductivity in the single crystalline nanohybrid of organic-bismuth cuprate.
A coordination compound of HgI(2)(pyridine)(2) can be successfully intercalated into a single crystalline Bi(2)Sr(2)CaCu(2)O(y) high-T(c) 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.
Chung
Il-Won
IW
Kwon
Soon-Jae
SJ
Kim
Seung-Joo
SJ
Jang
Eue Soon
ES
Hwang
Seong-Ju
SJ
Choy
Jin-Ho
JH
D001729:Bismuth / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D003460:Crystallization; D004553:Electric Conductivity; D046911:Macromolecular Substances / Q000737:chemistry; D053758:Nanoparticles / Q000737:chemistry*; D009941:Organomercury Compounds / Q000737:chemistry*; D011725:Pyridines / Q000737:chemistry*; D013324:Strontium / Q000737:chemistry; D013696:Temperature
D046911:Macromolecular Substances; D009941:Organomercury Compounds; D011725:Pyridines; D003300:Copper; D001729:Bismuth; D013324:Strontium