Weakly coupled type-II superconductivity in LaCoSi2 single crystal

IF 1.3 3区物理与天体物理 Q4 PHYSICS, APPLIED

Physica C-superconductivity and Its Applications Pub Date : 2025-01-21 DOI:10.1016/j.physc.2025.1354655

F. Ito , N. Kabeya , N. Kimura

引用次数: 0

Abstract

We report single crystal growth of LaCoSi

_{2}

and its superconducting properties. From the electrical resistivity measurement, we determined

T_{c} = 1.2

K and

μ_{0} H_{c 2} = 0.18 T

. From the specific heat measurement, we estimated the superconducting gap

Δ_{0} = 2.07 K

and revealed that the temperature dependence of the specific heat is well explained by the Mühlschlegel’s calculation, indicating that LaCoSi

_{2}

is a weak-coupling BCS superconductor. We also estimated the GL parameter

κ_{GL} = 9.8

from the

H - T

phase diagram and condensation energy. A large

κ_{GL}

indicates that LaCoSi

_{2}

is a type-II superconductor.

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LaCoSi2单晶的弱耦合ii型超导性

我们报道了LaCoSi2的单晶生长及其超导性能。通过电阻率测量，我们确定了Tc=1.2 K, μ0Hc2=0.18T。从比热测量中，我们估计出了超导间隙Δ0=2.07K，并揭示了比热的温度依赖性被m hlschlegel的计算很好地解释了，表明LaCoSi2是一种弱耦合BCS超导体。根据H - T相图和缩聚能估计出GL参数κGL=9.8。较大的κGL表明LaCoSi2为ii型超导体。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Physica C-superconductivity and Its Applications 物理-物理：应用

CiteScore

2.70

自引率

11.80%

发文量

102

审稿时长

66 days

期刊介绍： Physica C (Superconductivity and its Applications) publishes peer-reviewed papers on novel developments in the field of superconductivity. Topics include discovery of new superconducting materials and elucidation of their mechanisms, physics of vortex matter, enhancement of critical properties of superconductors, identification of novel properties and processing methods that improve their performance and promote new routes to applications of superconductivity. The main goal of the journal is to publish: 1. Papers that substantially increase the understanding of the fundamental aspects and mechanisms of superconductivity and vortex matter through theoretical and experimental methods. 2. Papers that report on novel physical properties and processing of materials that substantially enhance their critical performance. 3. Papers that promote new or improved routes to applications of superconductivity and/or superconducting materials, and proof-of-concept novel proto-type superconducting devices. The editors of the journal will select papers that are well written and based on thorough research that provide truly novel insights.