Crystal growth and transport properties of 4-leg spin-ladder compound La2Cu2O5: Occurrence of insulator-metal transition

C. Sekar, T. Watanabe, A. Matsuda, H. Shibata, Y. Zenitani, J. Akimitsu

研究成果: Article

抜粋

A remarkable metal-insulator transition has been observed, for the first time, in hole-doped spin ladder compound La2Cu2O5 (4-leg) single crystals. Hole-doping was carried out by means of high-oxygen-pressure annealing at 600°C under a pressure of 400 atm (20%O2+80%Ar at a total pressure of 2000 atm) using a hot-isostatic-pressing (HIP) furnace. In order to realize metallicity, a prolonged HIP-treatment for about 22 days or more is required. However, this annealing period is reduced to about 5-6 days, when the crystals are grown from the starting charges containing Ag in the form of Ag2O. Even in the as-grown state, the measured room-temperature resistivity is about two to three orders of magnitude lower than that of La2Cu2O5 Crystals grown from charges without silver. The results show that the silver addition facilitates the oxygenation of the La2Cu2O5 crystals.

元の言語English
ページ(範囲)1201-1203
ページ数3
ジャーナルInternational Journal of Inorganic Materials
3
発行部数8
DOI
出版物ステータスPublished - 2001 12 31
外部発表Yes

ASJC Scopus subject areas

  • Materials Chemistry

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