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Publication . Article . 2006

Synthesis and physical properties of multilayered cuprates

Akira Iyo; Yasumoto Tanaka; Y. Kodama; Hijiri Kito; Kazuyasu Tokiwa; Tsuneo Watanabe;
Closed Access
Published: 01 Oct 2006 Journal: Physica C: Superconductivity and its Applications, volume 445-448, pages 17-22 (issn: 0921-4534, Copyright policy )
Publisher: Elsevier BV

Abstract The multilayered cuprates of HgBa 2 Ca n −1 Cu n O y (Hg-system) and Ba 2 Ca n −1 Cu n O 2 n (O, F) (F-system) ( n = 5–9) have been synthesized under high-pressure to investigate the variation of T c . The a - and c -parameters showed reasonable behavior: as the n increases from 5 to 9 the a -parameter approached that of an infinite layer CaCuO 2 (IL) and the average interval of c (or c /2) was close to the c -parameter of the IL. All the samples showed high T c values of about 100 and 80 K for Hg- and F-system, respectively. In addition, the T c was almost constant for n ⩾ 5 for both systems. We have shown that the T c variations can be explained using inhomogeneous charge distribution model as follows. The high T c value is maintained because the charge reservoir layer supplies enough carriers for superconductivity to the adjacent CuO 2 planes (OP) even for large n . The T c is independent of n because the carrier concentration of OP is insensitive to n for large n .

Subjects by Vocabulary

Microsoft Academic Graph classification: Charge-carrier density Cuprate Superconductivity Condensed matter physics Charge density High pressure Analytical chemistry Materials science


Electrical and Electronic Engineering, Energy Engineering and Power Technology, Condensed Matter Physics, Electronic, Optical and Magnetic Materials

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