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Superconducting properties of Rh_9In_4S_4 single crystals

机译:Rh_9In_4S_4单晶的超导性能

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摘要

The synthesis and crystallographic, thermodynamic, and transport properties of single crystalline Rh_9In_4S_4 were studied. The resistivity, magnetization, and specific heat measurements all clearly indicate bulk superconductivity with a critical temperature, T_c ~ 2.25 K. The Sommerfeld coefficient y and the Debye temperature(Θ_D) were found to be 34 mJ mol~(-1) K~(-2) and 217 K, respectively. The observed specific heat jump, △C/γT_c = 1.66, is larger than the expected BCS weak coupling value of 1.43. Ginzburg-Landau (GL) ratio of the low-temperature GL-penetration depth, λ_(GL) ≈ 5750 A, to the GL-coherence length, ξ_(GL) ≈ 94 A, is large: κ ~ 60. Furthermore, we observed a peak effect in the resistivity measurement as a function of both temperature and magnetic field.
机译:研究了单晶Rh_9In_4S_4的合成及其晶体学,热力学和传输性质。电阻率,磁化强度和比热测量都清楚地表明了在临界温度T_c〜2.25 K时的体超导性。发现Sommerfeld系数y和Debye温度(Θ_D)为34 mJ mol〜(-1)K〜( -2)和217K。观察到的比热跃迁△C /γT_c= 1.66,大于预期的BCS弱耦合值1.43。低温GL穿透深度的λλ((GL)≈5750 A)与GL相干长度ξ_(GL)≈94 A的Ginzburg-Landau(GL)比很大:κ〜60。此外,我们观察到电阻率测量中的峰值效应是温度和磁场的函数。

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  • 来源
    《Physical review》 |2016年第9期|094524.1-094524.7|共7页
  • 作者单位

    Ames Laboratory, U.S. DOE, Iowa State University, Ames, Iowa 50011, USA,Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA;

    Ames Laboratory, U.S. DOE, Iowa State University, Ames, Iowa 50011, USA;

    Ames Laboratory, U.S. DOE, Iowa State University, Ames, Iowa 50011, USA,Department of Chemistry, Iowa State University, Ames, Iowa 50011, USA,Department of Chemistry, Princeton University, Princeton, NJ 08544, USA;

    Ames Laboratory, U.S. DOE, Iowa State University, Ames, Iowa 50011, USA;

    Ames Laboratory, U.S. DOE, Iowa State University, Ames, Iowa 50011, USA,Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA;

    Ames Laboratory, U.S. DOE, Iowa State University, Ames, Iowa 50011, USA,Department of Chemistry, Iowa State University, Ames, Iowa 50011, USA;

    Ames Laboratory, U.S. DOE, Iowa State University, Ames, Iowa 50011, USA,Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA;

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