50 K enhancement of T-c by pressure in the Hg-2212 superconductor

被引：11

作者：

Acha, C

Loureiro, SM

Chaillout, C

Tholence, JL

Capponi, JJ

Marezio, M

NunezRegueiro, M

机构：

[1] CNRS, CTR RECH TRES BASSES TEMP, F-38042 GRENOBLE 09, FRANCE

[2] CNRS, CRISTALLOG LAB, F-38042 GRENOBLE 09, FRANCE

[3] CNRS, EPM MATFORMAG, F-38042 GRENOBLE 09, FRANCE

来源：

SOLID STATE COMMUNICATIONS | 1997年 / 102卷 / 01期

关键词：

high T-c superconductors; X-ray scattering; electronic transport; phase transitions; high pressure;

D O I：

10.1016/S0038-1098(96)00757-0

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The superconducting properties of mercury cuprates are extremely sensitive to compression. The highest transition temperatures obtained up to date have been measured on Hg-1223 at 25-30 Gpa (T-c similar to 164 K at the onset) and imply an increase of about 20 K with respect to the ambient pressure T-c0. We report here the largest total pressure effect (> 50 K over a span of 20 GPa) ever observed for several samples of bi-mercury layer Hg2Ba2(Y1-xCax)Cu2O8-delta compositions. Different Ca doping levels give different initial T(c)s but retain the same strong pressure dependence. The large T-c increase with pressure for all the Hg-based compounds, independently of their doping level, is revealing the existence of a common structural parameter, which identification will be a guide for future synthesis efforts of record-high T-c materials. (C) 1997 Elsevier Science Ltd.

引用

页码：1 / 5

页数：5

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