Abstract
Based on a two-band isotropic Ginzburg-Landau theory, we study the magnetic properties of the recently observed superconducting crystal TlNi2Se2. Our exact solution of upper critical field reproduces the experimental data in a broad temperature range. It directly underlies the multi-gap superconductivity in this crystal. We also show that the effective mass of the electron for one band is about 20m e while that of the other band is only 0.6m e. This semi-heavy-fermion feature can qualitatively explain the experimental value of the Kadowaki-Woods ratio in TlNi2Se2.
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This work was supported by the Fundamental Research Funds for the Central Universities (Grant Nos. 12ZP11, 13TD03 and 2014MS60).
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Huang, H., Zhao, BP. Ginzburg-Landau Analysis on the Superconductivity in TlNi2Se2 . J Supercond Nov Magn 29, 885–889 (2016). https://doi.org/10.1007/s10948-015-3361-6
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DOI: https://doi.org/10.1007/s10948-015-3361-6