Superconducting properties in tantalum decorated three-dimensional   graphene and carbon structures
  We present here the results on superconducting properties in tantalum thin films (100nm thick) deposited on three-dimensional graphene (3DG) and carbon structures. A superconducting transition is observed in both composite thin films with a superconducting transition temperature of 1.2K and 1.0K, respectively. We have further measured the magnetoresistance at various temperatures and differential resistance dV/dI at different magnetic fields in these two composite thin films. In both samples, a much large critical magnetic field (~ 2 Tesla) is observed and this critical magnetic field shows linear temperature dependence. Finally, an anomalously large cooling effect was observed in the differential resistance measurements in our 3DG-tantalum device when the sample turns superconducting. Our results may have important implications in flexible superconducting electronic device applications. 
Cayetano S.F. Cobaleda, Xiaoyin Xiao, D. Bruce Burckel, Ronen Polsky,   Duanni Huang, Enrique Diez and W. Pan
cond-mat.supr-con cond-mat.mes-hall