Transport and magnetic properties of Tl2Ba2CuO6 showing a phase transition from a non-superconducting normal metal to a 85-K superconductor
✍ Scribed by Y. Kubo; Y. Shimakawa; T. Manako; H. Igarashi
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- English
- Weight
- 456 KB
- Volume
- 165-166
- Category
- Article
- ISSN
- 0921-4526
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✦ Synopsis
Transport and magnetic properties are investigated for Tl2Ba2Cu06 which shows a remarkable phase transition from a non-superconducting normal metal to a 85-K superconductor as the oxygen content is slightly decreased. Hall measurement demonstrates that the carrier (hole) density decreases as Tc increases, which means that superconductivity disappears at an excessively doped level of carrier density. The Hall coefficient (positive) shows, irrespective ofTc, a broad maximum at -120K which is much higher than Tc, and a negative temperature dependence at higher temperatures. The normal susceptibility increases as the carrier densi ty increases (Tc decreases). Such behaviors of physical properties in regard to the carrier density are similar to those observed in the over-doped La-Sr-Cu-O system.