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Effect of metamaterial engineering on the superconductive properties of ultrathin layers of NbTiN

机译：超材料工程对NBTIN超导层的超导性能

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摘要

The electronic transport and optical properties of high quality multilayers of NbTiN/A1N with ultrathin NbTiN layers were characterized. The anisotropy of the dielectric function of the multilayers confirmed their hyperbolic metamaterial properties. The superconductive transition temperature,T_c,of these engineered superconductors was enhanced up to 32% compared to the T_c of a single ultrathin NbTiN layer while the resistivity per NbTiN layer remained unchanged. We have demonstrated that this T_c increase can be attributed to enhanced electron-electron interaction in superconducting hyperbolic metamaterials. The measured critical fields are high and have an anomalous temperature dependence on the direction perpendicular to the magnetic field. These results demonstrate that the metamaterial engineering approach can be used to enhance H_(c2).
机译：具有超薄NBTIN层的高质量多层的电子传输和光学性能，其特征在于。 多层介质功能的各向异性证实了它们的双曲线超材料属性。 与单个超超尼蛋白层的T_C相比，这些工程超导体的超导转变温度T_C的增强至32％，而每个NBTIN层的电阻率保持不变。 我们已经证明，该T_C增加可归因于超导双曲超材料中的增强电子 - 电子相互作用。 测量的临界场很高并且对垂直于磁场的方向具有异常的温度依赖性。 这些结果表明，超材料工程方法可用于增强H_（C2）。

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  • 来源
    《Journal of Applied Physics》 |2021年第7期|073901.1-073901.7|共7页
  • 作者

    Vera N.Smolyaninova; William Korzi; Grace Yong; Anne-Marie Valente-Feliciano; David R.Beverstock; Joseph C.Prestigiacomo; Michael S.Osofsky; Igor I.Smolyaninov;

  • 作者单位

    Department of Physics Astronomy and Geosciences Towson University 8000 York Rd. Towson Maryland 21252 USA;

    Department of Physics Astronomy and Geosciences Towson University 8000 York Rd. Towson Maryland 21252 USA;

    Department of Physics Astronomy and Geosciences Towson University 8000 York Rd. Towson Maryland 21252 USA;

    Thomas Jefferson National Accelerator Facility 600 Kelvin Drive Newport News Virginia 23606 USA;

    Thomas Jefferson National Accelerator Facility 600 Kelvin Drive Newport News Virginia 23606 USA Department of Applied Science College William & Mary Williamsburg Virginia 23185 USA;

    Department of Applied Science College William & Mary Williamsburg Virginia 23185 USA;

    Naval Research Laboratory Washington DC 20375 USA;

    Department of Electrical and Computer Engineering University of Maryland College Park Maryland 20742 USA Saltenna LLC 1751 Pinnacle Drive #600 McLean Virginia 22102 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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