Temperature Dependence of the Magnetic Penetration Depth in the Case of the Coexistence of Charge Density Waves and Superconductivity

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• 作者：M. V. Eremin ; D. A. Sunyaev
• 关键词：High ; temperature superconductivity ; Charge density waves ; Magnetic penetration depth ; Superfluid density
• 刊名：Journal of Low Temperature Physics
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：185
• 期：5-6
• 页码：431-438
• 全文大小：416 KB
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Condensed Matter
  Characterization and Evaluation Materials
  Magnetism and Magnetic Materials
  
• 出版者：Springer Netherlands
• ISSN：1573-7357
• 卷排序：185

文摘

An analytical expression for the temperature dependence of the superfluid density in the regime of the coexistence of charge density waves (CDW) and superconductivity has been derived beyond the effective mass approximation. In contrast to the previous research on this subject, possible dispersions of both order parameters have been taken into account. In particular, it was found that when the CDW gap parameter depends on the wave vector, London’s type current is nonzero even above \(T_\mathrm{c}\), i.e., in the interval \(T_\mathrm{c}<T<T_\mathrm{CDW}\). The results of numerical calculations are discussed in the context of available experimental data for underdoped cuprates.