Spin-dependent transport characteristics of nanostructures based on armchair arsenene nanoribbons

By employing non-equilibrium Green's function combined with the spin-polarized density-functional theory, we investigate the spin-dependent electronic transport properties of armchair arsenene nanoribbons(a As NRs). Our results show that the spin-metal and spin-semiconductor properties can be observed in a As NRs with different widths. We also find that there is nearly 100% bipolar spin-filtering behavior in the a As NR-based device with antiparallel spin configuration. Moreover, rectifying behavior and giant magnetoresistance are found in the device. The corresponding physical analyses have been given.     

从幺正变换的角度理解半波损失

机械波或者光波在介质的分界面处反射可能会发生半波损失的现象.半波损失与能量守恒都体现在波函数的求解结果中.本文以机械波为例,从幺正变换的角度理解半波损失发生的条件及其与能量守恒之间的必然关系.     

大学物理教学中导入课程思政元素的技巧与方法

新时代背景下,大学物理教学以立德树人为根本,着力把培育和践行社会主义核心价值观,培育大学生公民意识、爱国情怀和文化自信融入课程教学全过程,更加突出课程思政在教学中的重要作用.本文介绍思政元素共振式嵌入技巧和方法,坚持适时适量导入思政元素,大力激发学生兴趣点,努力培养学生创新精神、工匠精神和奉献精神,引导学生把物理学理论...     

Structural properties of effective potential model by liquid state theories

This paper investigates the structural properties of a model fluid dictated by an effective inter-particle oscillatory potential by grand canonical ensemble Monte Carlo (GCEMC) simulation and classical liquid state theories.The chosen oscillatory potential incorporates basic interaction terms used in modeling of various complex fluids which is composed of mesoscopic particles dispersed in a solvent bath,the studied structural properties include radial distribution function in bulk and inhomogeneous density distribution profile due to influence of several external fields.The GCEMC results are employed to test the validity of two recently proposed theoretical approaches in the field of atomic fluids.One is an Ornstein-Zernike integral equation theory approach;the other is a third order + second order perturbation density functional theory.Satisfactory agreement between the GCEMC simulation and the pure theories fully indicates the ready adaptability of the atomic fluid theories to effective model potentials in complex fluids,and classifies the proposed theoretical approaches as convenient tools for the investigation of complex fluids under the single component macro-fluid approximation.