用传输线谱法研究强无序超薄MoC超导膜的电导率

IF 1.3 3区物理与天体物理 Q4 PHYSICS, APPLIED

Physica C-superconductivity and Its Applications Pub Date : 2025-06-05 DOI:10.1016/j.physc.2025.1354749

Martin Baránek , Pavol Neilinger , Daniel Manca , Oleg G. Turutanov , Miroslav Grajcar

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引用次数: 0

摘要

利用非接触式宽带传输线倒装片光谱技术探测了由强无序碳化钼薄膜制成的毫米大小的方形谐振器在GHz频率范围内的共振。通过无序超导体的复合导电性，用薄膜表面阻抗来模拟共振的温度依赖性，反映了这些超导体状态的达因斯超导密度。所得的达因斯展宽参数与扫描隧道光谱测量结果相当吻合。利用Sonnet软件中的EM模型可视化了二维谐振腔的特征模态。

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Conductivity of strongly disordered ultra-thin MoC superconducting films investigated by transmission line spectroscopy

The technique of non-contact broadband transmission line flip-chip spectroscopy is utilized to probe resonances of mm-sized square resonators fabricated from strongly disordered molybdenum carbide films in the GHz frequency range. The temperature dependence of the resonances was modeled by the surface impedance of the thin films via the complex conductivity of disordered superconductors, which reflects the Dynes superconducting density of states of these superconductors. The obtained Dynes broadening parameters relate reasonably well to those known from scanning tunneling spectroscopy measurements. The eigenmodes of the 2D resonator were visualized by EM model in Sonnet software.

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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.