Pressure dependence of the superconducting critical temperature Tc of HgBa2Ca2Cu3O8+x up to 26 GPa

✍ Scribed by D. Tristan Jover; R.J. Wijngaarden; A. Schilling; H.R. Ott; R. Griessen

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 238 KB
• Volume: 235-240
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(94)91671-3

✦ Synopsis

The pressuie dependence of the newly discovered mercury-compound IIgBa~CazCu3Og+~ (IIg-122:~) has been studied in delail up to 26 GPa in a cryogenic diamond anvil <:el! on a sample with a single superc:)ndncting phase.. Although initially "1"~ increases from 135 K at a rate of 1.0 Is[/(;Pa, at. intermediale pressures 07::/,)p ,lecrcas,:., rapidly. When pressure is increased %rther, however, T~ rises again significantly up |o 145 K at. 26 f;Pa (where OT~/Op ~_ 0.4 N/GPa). These results can be understood qualitatively on the basis of a charge-transfer model which allows a non-homogeneous distribution of holes among the inequivalent CuO~ layers.