Superconducting transitions of intrinsic arrays of weakly coupled 1D superconducting chains: The case of the extreme quasi-1D superconductor Tl2Mo6Se6
| Autor: | Bergk, B., Petrović, A. P., Wang, Z., Wang, Y., Salloum, D., Gougeon, P., Potel, M., Lortz, R. |
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| Rok vydání: | 2011 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1088/1367-2630/13/10/103018 |
| Popis: | Tl2Mo6Se6 represents a model system for quasi-one-dimensional superconductors. We investigate its superconducting transition in detail by means of electrical transport experiments on high-quality single crystalline samples with onset Tc = 6.8 K. Our measurements indicate a highly complex superconducting transition which occurs in different stages, with a characteristic bump in the resistivity and distinct plateau structures in the supercurrent gap imaged by V-I curves. We interpret these features as fingerprints of the gradual establishment of global phase coherence in an array of weakly coupled parallel one-dimensional (1D) superconducting bundles. In this way, we demonstrate that superconducting Tl2Mo6Se6 behaves like an intrinsic array of Proximity or Josephson junctions, undergoing a complex superconducting phase-ordering transition at 4.5 K which shows many similarities to the Berezinskii-Kosterlitz-Thouless transition. Comment: 11 pages, 6 figures, 1 table |
| Databáze: | arXiv |
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