Structural, normal-state, and superconducting properties of (La1−xBax−ySry)2CuO4

✍ Scribed by Y. Maeno; A. Odagawa; N. Kakehi; T. Suzuki; T. Fujita

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 797 KB
• Volume: 173
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(91)90731-d

✦ Synopsis

We report on the interplay among the structural transitions, transport anomalies and superconductivity in (La_,Ba,_ySrY)~Cu04. For (La,_,Bax)2Cu04

(y=O), it is now well established that high-T, superconductivity is suppressed in a narrow range of x around 0.0625. In this study, the amount of doping is held at x=0.0625 and the structural transition temperatures are controlled by a new parameter y. The appearance of the low-temperature tetragonal (TLT) phase and the depression of superconductivity correlate well, but unlike in (La, _-xBax)2Cu04 the transport anomalies can be decoupled from the structural transition, implying the presence of a new instability in the electronic state, which precedes the structural transition to the TLT phase.