原子层工程La2-xSrxCuO4-La2-xSrxZnO4异构结构的原子层工程
Xiaotao Xu1,2, Xi He1,3,4, Anthony T Bollinger1
1Condensed Matter Physics and Materials Science Division, Brookhaven National Laboratory, Upton, NY 11973, USA.
Nanomaterials (Basel, Switzerland)
|August 12, 2023
概括
研究人员开发了一种新的绝缘材料La2ZnO4,用于高温超导体 (HTS) 道连接点. 这一突破使得原子利的接口成为可能,并保留了先进电子设备的超导体特性.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 超导电性 超导电性 超导电性
背景情况:
- 制造超导体-绝缘体-超导体 (SIS) 约瑟夫森连接点与高温超导体 (HTS) 电极要求具有原子完美的接口.
- 30多年来,实现这些接口一直是一个重大挑战,阻碍了先进的HTS设备的开发.
研究的目的:
- 发现和描述一种新型的超稳定材料家族,用于HTS约瑟夫森交叉点的绝缘屏障.
- 为了证明使用新开发的绝缘材料成功制造高质量的HTS道结口.
主要方法:
- 合成La2-xSr_xZnO4 (LSZO) 材料使用原子层对层分子束表达式 (ALL-MBE).
- 专注于母化合物La2ZnO4 (LZO) 作为绝缘层,因为容易生长.
- 在低温下LZO的生长,以最大限度地减少离子间扩散,并与La2-xSr_xCuO4 (LSCO) 实现利的接口.
主要成果:
- 发现LSZO,一种与LSCO等HTS化合物表层相容的绝缘材料.
- 在使用低温LZO种植的LSCO/LZO/LSCO三层中展示原子利的接口.
- 保存LSCO电极中的超导特性,与之前的尝试相比显著改进.
结论:
- 作为绝缘层的LZO的发展克服了在制造HTS道连接处之前的局限性.
- 这一突破为生产高质量的HTS道连接提供了新的可能性,其超导性能不受损害.
- 这些发现为超导电子和量子技术的先进应用铺平了道路.
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