Observation of plasmon-phonons in a metamaterial superconductor using inelastic neutron scattering.
作者信息
Smolyaninova Vera N, Lynn Jeffrey W, Butch Nicholas P, Chen-Mayer Heather, Prestigiacomo Joseph C, Osofsky M S, Smolyaninov Igor I
机构信息
Department of Physics Astronomy and Geosciences, Towson University, 8000 York Rd., Towson, Maryland 21252, USA.
NIST Center for Neutron Research, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, Maryland 20899-6102, USA.
出版信息
Phys Rev B. 2019 Jul;100(2). doi: 10.1103/physrevb.100.024515.
A metamaterial approach is capable of drastically increasing the critical temperature, , of composite metal-dielectric superconductors as demonstrated by the tripling of that was observed in bulk Al-AlO coreshell 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-AlO core-shell metamaterials using inelastic neutron scattering. This result provides support for this mechanism of superconductivity in metamaterials.
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