Superconductivity in the overdoping state of the (Hg,Tl)(Ba,La)2CuOυ and (Hg,Tl)2Ba2CuOν systems

✍ Scribed by Satoru Nakajima; Takeo Oku; Kenzo Nagase; Yasuhiko Syono

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 342 KB
• Volume: 262
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(96)00186-4

✦ Synopsis

The effect of TI substitution for Hg in the Hg-Ba-Cu-O system has been investigated for a wide substitution range. The TI substitution range of the single and double (Hg,TI) layer systems was observed for 0-50% and 50-100%, respectively. Both the single and double (Hg,T1) layer phases show the temperature dependence of resistivity of the metallic normal state and the overdoping state is confirmed by the substitution of Ba with La where the T c increases with increasing La concentration. The T~ of the single (Hg,T1) layer system, Hgl_~TlxBa2CuO v, decreases with increasing TI concentration and becomes non-superconducting for x ~ 0.4. The double (Hg,T1) layer system, Hg 2_ zT1 ~Ba2CuO~, is non-superconducting due to the overdoping state.