论文标题
汞基层中的Parmagnons和高温超导性
Paramagnons and high-temperature superconductivity in mercury-based cuprates
论文作者
论文摘要
我们介绍了高温超导蛋糕的HG家庭的前两个Ruddlesden-Popper成员中的磁激发的比较研究，这些成员在化学上几乎相同，并且在所有Cuprate家族中具有最高的临界温度（$ T_ \ MATHRM {C} $）。我们的非弹性光子散射实验表明，除了$ \ sim130 \％$的能量尺度因子与$ t_ \ mathrm {c} $相匹配的$ \ sim130 \％$之外，这两种化合物的帕拉贡光谱几乎是相同的，正如预期的那样，在磁性库库配对的理论中。通过将我们的观察结果与其他铜矿联系起来，我们推断出磁相互作用的强度决定了$ t_ \ mathrm {c} $可以达到的高度。我们的发现可以看作是同位素效应的磁性类似物，因此可以牢固支持磁介导的高温超导性的模型。
We present a comparative study of magnetic excitations in the first two Ruddlesden-Popper members of the Hg-family of high-temperature superconducting cuprates, which are chemically nearly identical and have the highest critical temperature ($T_\mathrm{c}$) among all cuprate families. Our inelastic photon scattering experiments reveal that the two compounds' paramagnon spectra are nearly identical apart from an energy scale factor of $\sim130\%$ that matches the ratio of $T_\mathrm{c}$'s, as expected in magnetic Cooper pairing theories. By relating our observations to other cuprates, we infer that the strength of magnetic interactions determines how high $T_\mathrm{c}$ can reach. Our finding can be viewed as a magnetic analogue of the isotope effect, thus firmly supporting models of magnetically mediated high-temperature superconductivity.
