2008/06/12 by Mingliang Tian, Nitesh Kumar, Thomas E. Mallouk +1 · 1 citation
Physics and Astronomy · #Advanced Condensed Matter Physics #Physics of Superconductivity and Magnetism #Topological Materials and Phenomena #cond-mat.mes-hall #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.78.045417
11 pages, 5 figures. submitted to PRB
arxiv created 2008/06/12 · openalex publication_date 2008/07/16 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
An unusual enhancement of resistance (i.e., a ``superresistivity'') below a certain characteristic temperature Tsr was observed in granular Bi nanowires. This ``superresistive'' state was found to be dependent on the applied magnetic field as well as the excitation current. The suppression of Tsr by magnetic field resembles that of a superconductor. The observed superresistivity appears to be related to the nucleation of local superconductivity inside the granular nanowire without long-range phase coherence. The phenomenon is reminiscent of the ``Cooper-pair insulator'' observed previously in ultrathin two-dimensional superconducting films and three-dimensional percolative superconducting films.