A series circuit of thermal rectifiers: an effective way to enhance   rectification ratio
  The low rectification ratio limits the application of thermal rectifiers. In this paper, it is found that a series circuit of thermal rectifiers in asymmetric graphene/graphene phononic crystal (GPnC) structures can improve rectification significantly. The simulations by using non-equilibrium molecular dynamics (NEMD) are performed. Moreover, the size effect on thermal rectification is also studied and discussed. 
Shiqian Hu, Meng An, Nuo Yang, and Baowen Li
cond-mat.mes-hall