在压力下的三层基酸盐La_{4}Ni_{3}O_{10}中通过电子兴奋剂增强的s^{±}-波超导的预测
Yang Zhang1, Ling-Fang Lin1, Adriana Moreo1,2
1Department of Physics and Astronomy, <a href="https://ror.org/020f3ap87">University of Tennessee</a>, Knoxville, Tennessee 37996, USA.
Physical review letters
|October 11, 2024
概括
三层La4Ni3O10中的超导是由Ni轨道驱动的,并表现出±波配对. 它的强度高峰接近6.7%的电子兴奋剂,当洞口袋消失时消失.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 材料科学 材料科学 材料科学
- 量子材料是一种量子材料.
背景情况:
- 最近对压力下的三层La4Ni3O10中的超导性进行了观察.
- 类似于像La3Ni2O7.7.这样的二元化系统.
研究的目的:
- 全面研究三层La4Ni3O10.10的电子和磁性特性.
- 研究压力诱导超导的机制.
- 澄清电子结构和轨道相互作用的作用.
主要方法:
- 一开始的计算.
- 随机相近似 (RPA) 技术.随机相近似技术.
- 电子带结构和费米表面的分析.
主要成果:
- 确定了一个Ni两个轨道模型,其中d3z2-r2轨道起着关键作用.
- 由于费米表面嵌套而观察到±波超导配对.
- 在~6.7%的电子兴奋剂发现配对强度峰值.
- 已确认的内平面 (π,π) 反铁磁顺序,具有特定的层合.
结论:
- 拉4尼3O10的电子结构支持压力诱导的超导.
- 超导与特定的费米表面特征和轨道相互作用有关.
- 这些发现表明,相关材料的高Tc超导性可能不仅仅取决于三层/单层结构.
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