Tuning of critical temperature in an et organic superconductor

Autor:	Gunzi Saito, Kenji Ookubo, Olga O. Drozdova, Kyuya Yakushi
Rok vydání:	2002
Předmět:	Superconductivity Crystallography Condensed matter physics Chemistry Mott insulator Organic superconductor General Materials Science General Chemistry Condensed Matter Physics Layer (electronics) Ion
Zdroj:	Molecular Crystals and Liquid Crystals. 380:23-27
ISSN:	1563-5287 1542-1406
DOI:	10.1080/713738726
Popis:	A variety of superconductors having T c from 3 to 10 K were produced by the replacement of small portion of Cu(CN) 2 in the anion layer of a Mott insulator, κ-(ET) 2 Cu 2 (CN) 3 by N(CN) 2 . By the incorporation of N(CN) 2 , some Cu +1 ions were changed to Cu + ions. The complex is formulated as κ-(ET) 2 (Cu +1 ) 2−x−y (Cu +2 ) x (CN) 3-2y [N(CN) 2 ] y , with mainly y=0, 0.05, 0.3-0.4, 0.8 and 1.0 and x=0-1200 ppm. The T c depends on both x and y. The batches at y=0.3-0.4 have different T c 's (3.1, 6.5, 7.5, 8.8, 10.2 K) suggesting the important role of the amount of Cu 2+ .
Databáze:	OpenAIRE
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