Sweet sorghum, the world's fifth most important cereal after rice, corn, wheat and barley, is a very attractivesource for biomass production. This raw material complements sugarcane production and is emerging as t...Sweet sorghum, the world's fifth most important cereal after rice, corn, wheat and barley, is a very attractivesource for biomass production. This raw material complements sugarcane production and is emerging as the idealfeed for animals and for the production of the first-generation of biofuels, such as ethanol and value-added chemicals.At present, most of the studies about sweet sorghum focus on utilization (such as ethanol production), and thestudy of suger accumulation in stem are rarely.展开更多
We investigate theoretically the spin accumulation in a Rashba spin-orbit coupling (SOC) nanoribbon nonadiabatically connected to a normal conductor.Both the nanoribbon and conductor are described by a hard-wall confi...We investigate theoretically the spin accumulation in a Rashba spin-orbit coupling (SOC) nanoribbon nonadiabatically connected to a normal conductor.Both the nanoribbon and conductor are described by a hard-wall confining potential.Using the scattering matrix approach within the effective free-electron approximation,we have calculated the out-of-plane spin accumulation in the nanoribbon.It is found that the spin accumulation shifts toward the two edges of nanoribbon with the increasing of propagation modes.Specifically,as the Rashba SOC strength increases the spin accumulation in the nanoribbon will be enhanced and this result may suggest us a simple method to control the spin accumulation of the system by Rashba SOC strength.展开更多
文摘Sweet sorghum, the world's fifth most important cereal after rice, corn, wheat and barley, is a very attractivesource for biomass production. This raw material complements sugarcane production and is emerging as the idealfeed for animals and for the production of the first-generation of biofuels, such as ethanol and value-added chemicals.At present, most of the studies about sweet sorghum focus on utilization (such as ethanol production), and thestudy of suger accumulation in stem are rarely.
基金Supported by the Specialized Research Fund for the Doctoral Program of Higher Education of China under Grant No.20060542002the Hunan Provincial Natural Science Foundation of China under Grant No.06JJ2097the Hunan University of Science and Engineering Research Foundation of China under Grant No.07XKYTB001
文摘We investigate theoretically the spin accumulation in a Rashba spin-orbit coupling (SOC) nanoribbon nonadiabatically connected to a normal conductor.Both the nanoribbon and conductor are described by a hard-wall confining potential.Using the scattering matrix approach within the effective free-electron approximation,we have calculated the out-of-plane spin accumulation in the nanoribbon.It is found that the spin accumulation shifts toward the two edges of nanoribbon with the increasing of propagation modes.Specifically,as the Rashba SOC strength increases the spin accumulation in the nanoribbon will be enhanced and this result may suggest us a simple method to control the spin accumulation of the system by Rashba SOC strength.
