论文标题
自旋三旋转超导体候选者ute $ _2 $
Incommensurate Spin Fluctuations in the Spin-triplet Superconductor Candidate UTe$_2$
论文作者
论文摘要
自旋三型超导体具有广泛的当前兴趣，因为它们可以托管拓扑状态和Majoraana Ferimons对于量子计算很重要。基于铀的重力超导剂UTE $ _2 $被认为是一种旋转三个超导体超导体，类似于UGE $ _2 $，URHGE和UCOGE，其中超导阶段与Ferromagnetic（FM）不稳定和Spin-spin-triplet Electrucation tail fluction flm druction flm ins flm ins trip flm sapl flm。在这里，我们使用中子散射表明，尽管UTE $ _2 $没有静态磁性降低至0.3 K，但其磁性却以反铁磁（Antymagnetic（AF）订购波向量附近的不均衡自旋波动为主，并至少延伸至2.6 MEV。我们能够理解UTE $ _2 $的主要不相差的自旋波动，该电子结构使用合并的密度功能和动态平均场理论计算得出的电子结构。
Spin-triplet superconductors are of extensive current interest because they can host topological state and Majorana ferimons important for quantum computation. The uranium based heavyfermion superconductor UTe$_2$ has been argued as a spin-triplet superconductor similar to UGe$_2$, URhGe, and UCoGe, where the superconducting phase is near (or coexists with) a ferromagnetic (FM) instability and spin-triplet electron pairing is driven by FM spin fluctuations. Here we use neutron scattering to show that although UTe$_2$ exhibits no static magnetic order down to 0.3 K, its magnetism is dominated by incommensurate spin fluctuations near antiferromagnetic (AF) ordering wave vector and extends to at least 2.6 meV. We are able to understand the dominant incommensurate spin fluctuations of UTe$_2$ in terms of its electronic structure calculated using a combined density functional and dynamic mean field theory.
