论文标题
通过扫描鱿鱼显微镜可视化中间状态中的中间状态中的超导dirac半学pdte $ {} _ 2 $
Visualization by scanning SQUID microscopy of the intermediate state in the superconducting Dirac semimetal PdTe${}_2$
论文作者
论文摘要
DIRAC半度pdte $ {} _ 2 $变为温度$ t_ {c} = 1.6 $ 〜k。热力学和MUON自旋旋转实验支持I型超导性，这对于二元化合物是不寻常的。 I型超导体的关键特性是中间状态，它在低于热力学关键场$ h_ {c} $的磁场处呈现超导体和正常域（通量结构）的共存。通过扫描鱿鱼显微镜（SSM），我们在PDTE $ {} _ 2 $的超导状态下观察到通量结构。磁通结构是强烈的历史依赖于从圆形到层状形状的过渡，因为磁场越来越增加。在表面测得的磁场幅度表明存在Landau分支。已经确定了中间状态的域壁宽度。
The Dirac semimetal PdTe${}_2$ becomes superconducting at a temperature $T_{c}=1.6$~K. Thermodynamic and muon spin rotation experiments support type-I superconductivity, which is unusual for a binary compound. A key property of a type-I superconductor is the intermediate state which presents a coexistence of superconducting and normal domains (flux structures) at magnetic fields lower than the thermodynamic critical field $H_{c}$. By means of scanning SQUID microscopy (SSM) we observe flux structures in the superconducting state of PdTe${}_2$. The flux structures are strongly history dependent with a transition from round shapes to laminar shapes as the magnetic field is more and more increased. The field amplitudes measured at the surface are indicative for the presence of Landau branching. The domain wall width in the intermediate state has been determined.
