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首页> 外文期刊>Physical review >Multiband conductivity and a multigap superconducting phase in V_3Si films from optical measurements at terahertz frequencies
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Multiband conductivity and a multigap superconducting phase in V_3Si films from optical measurements at terahertz frequencies

机译：V_3Si薄膜中的多频带电导率和多间隙超导相，基于太赫兹频率的光学测量

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摘要

The possibility of multiband conductivity and multigap superconductivity is explored in oriented V3Si thin films by means of reflectance and transmittance measurements at terahertz frequencies. The temperature dependence of the transmittance spectra in the normal state gives evidence of two bands contributing to the film conductivity. This outcome is consistent with electronic structure calculations performed within density functional theory. On this basis, we performed a detailed data analysis and found that all optical data can be consistently accounted for within a two-band framework, with the presence of two optical gaps in the superconducting state corresponding to 2Δ/kT_c values close to 1.8 and 3.8.
机译：通过在太赫兹频率下的反射率和透射率测量，探索了定向V3Si薄膜中多带电导率和多间隙超导性的可能性。正常状态下透射光谱的温度依赖性提供了两个带有助于膜电导率的证据。这一结果与在密度泛函理论中进行的电子结构计算相一致。在此基础上，我们进行了详细的数据分析，发现所有光学数据都可以在两个波段的框架内得到统一解释，并且在超导状态下存在两个光学间隙，对应于2Δ/ kT_c值接近1.8和3.8 。

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  • 来源
    《Physical review》 |2010年第9期|p.092509.1-092509.4|共4页
  • 作者

    A. Perucchi; D. Nicoletti; M. Ortolani; C. Marini; R. Sopracase; S. Lupi; U. Schade; M. Putti; I. Pallecchi; C. Tarantini; M. Ferretti; C. Ferdeghini; M. Monni; F. Bernardini; S. Massidda; P. Dore;

  • 作者单位

    Sincrotrone Trieste, Area Science Park, I-34012 Trieste, Italy;

    Dipartimento di Fisica, Universita di Roma La Sapienza, Piazzale Aldo Moro 2, I-00185 Rome, Italy;

    CNR-Istituto di Fotonica e Nanotecnologie, Via Cineto Romano 42, I-00156 Rome, Italy;

    Dipartimento di Fisica, Universita di Roma La Sapienza, Piazzale Aldo Moro 2, I-00185 Rome, Italy;

    Dipartimento di Fisica, Universita di Roma La Sapienza, Piazzale Aldo Moro 2, I-00185 Rome, Italy;

    CNR-IOM and Laboratorio TASC and Dipartimento di Fisica, Universita di Roma La Sapienza, Piazzale Aldo Mow 2, I-00185 Rome, Italy;

    Berliner Elektronenspeicherring-Gesellshaft fuer Synchrotronstrahlung m.b.H., Albert-Einstein Strasse 15, D-12489 Berlin, Germany;

    CNR-SPIN and Universita di Genova, Via Dodecaneso 33, I-16146 Genoa, Italy;

    CNR-SPIN and Universita di Genova, Via Dodecaneso 33, I-16146 Genoa, Italy;

    CNR-SPIN and Universita di Genova, Via Dodecaneso 33, I-16146 Genoa, Italy;

    CNR-SPIN and Universita di Genova, Via Dodecaneso 33, I-16146 Genoa, Italy;

    CNR-SPIN and Universita di Genova, Via Dodecaneso 33, I-16146 Genoa, Italy;

    CNR-IOM-SLACS and Dipartimento di Fisica, Universita di Cagliari, I-09124 Monserrato (Cagliari), Italy;

    CNR-IOM-SLACS and Dipartimento di Fisica, Universita di Cagliari, I-09124 Monserrato (Cagliari), Italy;

    CNR-IOM-SLACS and Dipartimento di Fisica, Universita di Cagliari, I-09124 Monserrato (Cagliari), Italy;

    CNR-SPIN and Dipartimento di Fisica, Universita di Roma La Sapienza, Piazzale Aldo Mow 2, I-00185 Rome, Italy;

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  • 正文语种 eng
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  • 关键词

    optical properties; metals; alloys and binary compounds (including A15, MgB2, etc.); infrared and raman spectra;

    机译：光学性质金属;合金和二元化合物（包括A15;MgB2等）;红外光谱和拉曼光谱;

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