Based on the non-equilibrium Green’s method and density functional theory,we investigate the electronic trans-port properties of ternary heterostructures based on carbon nanotubes and boron nitride nanotubes,with dif...Based on the non-equilibrium Green’s method and density functional theory,we investigate the electronic trans-port properties of ternary heterostructures based on carbon nanotubes and boron nitride nanotubes,with different atomic compositions,coupled to gold electrodes.Negative differential resistance(NDR)behavior can be observed due to suppression of the conduction channel at a certain bias.More importantly,the position of NDR can be tuned into the bias range as low as tens of meV by increasing the length of boron nitride nanotube.The peak-to-valley ratio,which is a typical character of NDR behavior,is also sensitive to the atomic compositions.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No 11104115the Natural Science Foundation of Shandong Province under Grant No ZR2009AL004the Doctoral Foundation of University of Jinan under Grant No XBS1004.
文摘Based on the non-equilibrium Green’s method and density functional theory,we investigate the electronic trans-port properties of ternary heterostructures based on carbon nanotubes and boron nitride nanotubes,with different atomic compositions,coupled to gold electrodes.Negative differential resistance(NDR)behavior can be observed due to suppression of the conduction channel at a certain bias.More importantly,the position of NDR can be tuned into the bias range as low as tens of meV by increasing the length of boron nitride nanotube.The peak-to-valley ratio,which is a typical character of NDR behavior,is also sensitive to the atomic compositions.
