Antiresonance induced spin-polarized current generation

According to the one-dimensional antiresonance effect (Wang X R, Wang Y and Sun Z Z 2003 Phys. Rev. B 65 193402), we propose a possible spin-polarized current generation device. Our proposed model consists of one chain and an impurity coupling to the chain. The energy level of the impurity can be occupied by an electron with a specific spin, and the electron with such a spin is blocked because of the antiresonance effect. Based on this phenomenon our model can generate the spin-polarized current flowing through the chain due to different polarization rates. On the other hand, the device can also be used to measure the generated spin accumulation. Our model is feasible with today's technology.     

TPACK理论在高中物理教学中的应用研究——以自由落体运动为例

信息技术与课程整合是信息时代下教育教学发展和进步的必然要求,在这一背景下TPACK理论(整合技术的学科教学法知识)恰好为广大基础教育工作者进行信息技术化教学提供了坚实的理论基础.由于高中物理课程的有关特点,该理论对于物理学科的教学具有更加深刻的指导意义,因此本文从3个方面探讨了TPACK理论在高中物理教学中应用的必要性,研究了TPACK理论的应用策略,并以"自由落体运动"为例进行了TPACK体系分析,希望为TPACK理论在高中物理教学中的应用提供一些参考.