Observation of plasmon-phonons in a metamaterial superconductor using inelastic neutron scattering
Observation of plasmon-phonons in a metamaterial superconductor using inelastic neutron scattering
复制标题
使用非弹性中子散射观察超材料超导体中的等离子体声子
DOI：
10.1103/physrevb.100.024515
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发表时间：
2019
影响因子：
3.7
通讯作者：
Smolyaninov, Igor I.
中科院分区：
文献类型：
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作者：
Smolyaninova, Vera N.;Lynn, Jeffrey W.;Butch, Nicholas P.;Chen-Mayer, Heather;Prestigiacomo, Joseph C.;Osofsky, M. S.;Smolyaninov, Igor I.
超材料方法能够大幅提高复合金属-介电超导体的临界温度，正如在大块铝核壳超材料中观察到的三倍所证明的那样。麦克斯韦-加内特近似的基础上的理论模型提供了一个微观的解释，这种效果的电子-电子配对介导的混合等离子体-声子激发。我们报告的观察，这种激发在铝核壳超材料使用非弹性中子散射。这一结果为超材料中的超导机制提供了支持。
A metamaterial approach is capable of drastically increasing the critical temperature,, of composite metal-dielectric superconductors as demonstrated by the tripling ofthat was observed in bulk Al-core-shell metamaterials. A theoretical model based on the Maxwell-Garnett approximation provides a microscopic explanation of this effect in terms of electron-electron pairing mediated by a hybrid plasmon-phonon excitation. We report an observation of this excitation in Al-core-shell metamaterials using inelastic neutron scattering. This result provides support for this mechanism of superconductivity in metamaterials.