Relationship between negative differential thermal resistance and ballistic transport
Laboratory of Quantum Information Technology, Institute of Condensed Matter Physics, School of Physics and Telecommunication Engineering, South China Normal University - 510006 Guangzhou, China
2 Institute of Modern Physics, Chinese Academy of Sciences, and Department of Physics, Lanzhou University 730000 Lanzhou, China
Accepted: 28 March 2011
In previous paper (Zhong W.-R. et al., Phys. Rev. E, 79 (2009) 050103(R)), it had been found that in the two-segment Frenkel-Kontorova (FK) model, transition from the exhibition to the nonexhibition of negative differential thermal resistance (NDTR) is consistent with the crossover from the ballistic to diffusive transport. It seems that the NDTR is induced by ballistic transport. When we further study ballistic transport in the two-segment Morse on-site potential model, it is found that no crossover from the ballistic to diffusive transport occurs accompanying transition from the exhibition to the nonexhibition of NDTR. There is always ballistic transport. Therefore, ballistic transport is not the sufficient condition of NDTR.
PACS: 44.10.+i – Heat conduction / 05.60.Cd – Classical transport / 07.20.-n – Thermal instruments and apparatus
© EPLA, 2011