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  • 标题:Metamaterial superconductors
  • 本地全文:下载
  • 作者:Igor I. Smolyaninov ; Vera N. Smolyaninova
  • 期刊名称:Nanophotonics
  • 印刷版ISSN:2192-8606
  • 电子版ISSN:2192-8614
  • 出版年度:2018
  • 卷号:7
  • 期号:5
  • 页码:795-818
  • DOI:10.1515/nanoph-2017-0115
  • 出版社:Walter de Gruyter GmbH
  • 摘要:

    Searching for natural materials exhibiting larger electron-electron interactions constitutes a traditional approach to high-temperature superconductivity research. Very recently, we pointed out that the newly developed field of electromagnetic metamaterials deals with the somewhat related task of dielectric response engineering on a sub-100-nm scale. Considerable enhancement of the electron-electron interaction may be expected in such metamaterial scenarios as in epsilon near-zero (ENZ) and hyperbolic metamaterials. In both cases, dielectric function may become small and negative in substantial portions of the relevant four-momentum space, leading to enhancement of the electron pairing interaction. This approach has been verified in experiments with aluminum-based metamaterials. Metamaterial superconductor with Tc=3.9 K have been fabricated, which is three times that of pure aluminum (Tc=1.2 K), which opens up new possibilities to improve the Tc of other simple superconductors considerably. Taking advantage of the demonstrated success of this approach, the critical temperature of hypothetical niobium, MgB2- and H2S-based metamaterial superconductors is evaluated. The MgB2-based metamaterial superconductors are projected to reach the liquid nitrogen temperature range. In the case of an H2S-based metamaterial, the projected Tc appears to reach ~250 K.

  • 关键词:superconductivity ; electromagnetic metamaterials ; dielectric properties ; epsilon near-zero metamaterial ; hyperbolic metamaterial
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