在UTe2的正常状态下没有散装电荷密度波序
C S Kengle1,2, J Vonka3, S Francoual4
1Los Alamos National Laboratory, Los Alamos, NM, USA. ckengle@lanl.gov.
Nature communications
|November 9, 2024
概括
在UTe2中,一个对密度波 (PDW) 状态.
科学领域:
- 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
- 量子材料是一种量子材料.
背景情况:
- UTe2 是一个自旋三连体超导体.
- 扫描道显微镜 (STM) 揭示了UTe2.2中的对密度波 (PDW) 状态.
- 这种PDW状态具有与超导临界温度 (Tc) 以上观察到的电荷密度波 (CDW) 顺序无法区分的波向量.
研究的目的:
- 在UTe2.2中研究电荷密度波 (CDW) 顺序的散体性质.
- 要确定PDW或CDW是否是UTe2.2中的初级 (母) 顺序.
- 在UTe2.2中解决PDW和CDW订单之间的关系.
主要方法:
- 使用共振弹性X射线散射 (REXS) 来寻找散装电荷的顺序.
- 对Tc以上的批量充电订单进行了系统的搜索.
- 分析了REXS数据,以确定是否有批量CDW订单.
主要成果:
- 之前由STM识别的费用订单的结构因子在REXS灵敏度内大部分缺席.
- 在Tc以上没有发现CDW批量订单的证据.
- 这表明观察到的电荷调制可能局限于表面.
结论:
- 大量CDW顺序的缺失表明有两个可能性:在Tc时同时凝结密度波顺序,暗示PDW为母相,或表面局部电荷调制.
- 这些发现挑战了以前对UTe2.2中CDW顺序的解释.
- 需要进一步的研究,以充分阐明密度波序的性质在UTe2.
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