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首页> 外文期刊>Physics in Canada >CUPRATE HIGH TEMPERATURE SUPERCONDUCTIVITY: RELIEVING A QUANTUM TRAFFIC JAM
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CUPRATE HIGH TEMPERATURE SUPERCONDUCTIVITY: RELIEVING A QUANTUM TRAFFIC JAM

机译：CUPRATE高温超导性：缓解量子交通拥堵

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摘要

In 1986, Bednorz and Muller made the remarkable discovery of high temperature superconductivity in a La-Ba-Cu-0 ceramic oxide material [1], with a transition temperature 7',, – 30K. Soon thereafter, various other superconductors in this class of cuprate materials were synthesized, such as Y-Ba-Cu-O and La-Sr- Cu-0 compounds, with the highest 71.– 150K reported in HgBa2Ca2Cu30x. Common to all these materials are stacked Cu02 square lattice planes; other elements such as La, Ba, Hg, and 0, reside in the spaces between the layers. Varying the concentration of the spacer elements during crystal growth allows one to control the electron concentration in the Cu02planes. The phase diagram of these materials has the common feature that doping holes, by such means, into a parent insulating antiferromagnet leads to superconductivity over a wide range of hole doping, x ,--' 0.05-0.25 holes per copper. Over the past twenty five years, the quest to understand the origin of high temperature superconductivity, the global phase diagram, and the puzzling properties of these materials, has led to many significant developments, especially in the field of 'strongly correlated electron systems' [2]. We will dicuss some of these developments, emphasizing Canadian contributions, and refer to an accompanying article by A.-M. Tremblay for further insights.
机译：1986年，Bednorz和Muller在La-Ba-Cu-0陶瓷氧化物材料[1]中发现了高温超导性[1]，其转变温度为7'，– 30K。此后不久，合成了这类铜酸盐材料中的其他各种超导体，例如Y-Ba-Cu-O和La-Sr-Cu-0化合物，HgBa2Ca2Cu30x中报道的最高71.–150K。所有这些材料的共同点是堆叠的CuO2方形晶格平面。其他元素（例如La，Ba，Hg和0）位于层之间的空间中。在晶体生长期间改变间隔物元素的浓度允许人们控制CuO 2平面中的电子浓度。这些材料的相图具有共同的特征，即通过这种方式将空穴掺杂到母体绝缘反铁磁体中会导致在大范围的空穴掺杂中产生超导性，每个铜x x --- 0.05-0.25个孔。在过去的二十五年中，寻求了解高温超导性的起源，整体相图以及这些材料的令人困惑的特性，导致了许多重大的发展，特别是在“高度相关的电子系统”领域[ 2]。我们将讨论其中的一些发展，重点介绍加拿大的贡献，并参考A.-M.的随附文章。 Tremblay提供进一步的见解。

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