在hg-1223中的tc在150k以上的压力诱导增强
概括
高压研究显示,---铜-氧化物 (HgBa2Ca2n-1) Cu2nO2n+2+delta) 超导体的临界温度 (Tc) 与压力显著增加. 这表明在环境压力下可能存在更高的T (c) 值.
科学领域:
- 高压物理学的高压物理
- 材料科学是一种材料科学.
- 超导电性 超导电性 超导电性
背景情况:
- 同源系列HgBa(2)Can-1 Cun O2n+2+delta表现出显著的超导特性.
- 此前在多相Hg-Ba-Ca-Cu-O样本中观察到133克尔文的临界温度 (T(c),该温度归因于Hg-1223化合物.
研究的目的:
- 为了研究压力对Hg-1223相的超导过渡温度 (T(c)) 的影响.
- 探索在这种类型的材料中实现更高临界温度的潜力.
主要方法:
- 在不同压力下进行了温度依赖的电阻测量.
- 在实验中使用了高纯度 (>95%) 的Hg-1223相.
主要成果:
- c) 稳步增加,每千兆帕斯卡压力约为1凯尔文,达到15千兆帕斯卡.
- 150 克尔文的温度和 157 克尔文的开始过渡记录在 23.5 千兆帕斯卡尔.
- 观察到的T(c) 的压力依赖性明显大于类似化合物.
结论:
- 压力下的T (c) 显著增加表明,在大气压下可能可以达到更高的临界温度.
- 对优化Hg-1223化合物的进一步研究可能会导致新的高温超导体.
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