【摘 要】
:
In this talk,we discuss several new effects in predicting and optimizing the thermoelectric performance of some example systems.We first show that band convergence in the Mg2Si1-xSnx solid solutions a
【机 构】
:
School of Physics and Technology,Wuhan University,Wuhan 430072,China
论文部分内容阅读
In this talk,we discuss several new effects in predicting and optimizing the thermoelectric performance of some example systems.We first show that band convergence in the Mg2Si1-xSnx solid solutions at a particular Sn conent leads to a high value of the Seebeck coefficient,which has been confirmed by explicit calculations and experimental measurements.
其他文献
A Raman substrate composed of silver nano-cubes with circular silver grating is experimentally demonstrated,which can enhance Raman scattering signals of probe molecules high effectively.Fig.1(a)is th
How ions occupy themselves at hydrophobic interface plays a key role in physical,chemical,atmospheric,and biological processes.However,hydrophobic molecules often gather together on water surface,thus
透射光栅谱仪作为软X射线能谱测量的一种测量仪器,因其设计简单,易于调节,相对于其它谱仪有较宽的测谱范围,较高的灵敏度,以及较高的谱分辨,被广泛应用于惯性约束聚变等离子体X射线诊断中.透射光栅作为光栅谱仪的核心元件,其线对密度决定光栅谱仪的分辨率,因此,我们通过电子束光刻、X射线光刻复制、光学光刻、加强筋结构优化等主要技术路线,改进光栅制作工艺,国内首次研制出大面积高线对密度光栅,其面积为1×1mm
Geodesic acoustic mode(GAM)[1] is mainly an on-flux-surface axi-symmetric(n = 0)electrostatic plasma oscillation that involves the non-vanishing perpendicular plasma compressibility due to the existen
基于Mach-Zehnder干涉的光纤温度与位移传感器具有结构简单、制作成本低廉、抗电磁干扰能力强、灵敏度高等优点[1-2]。论文分别提出了基于全光纤Mach-Zehnder干涉的温度传感器与位移传感器的理论、方案和相关技术,利用光谱漂移直接检测信号的方法,实现了对温度和位移的传感。在温度传感实验中,通过改变传感臂在温度场中的不同有效长度对温度进行测量,得到在传感臂不同有效长度下光谱漂移与温度变化
环境压力在0.1-10 Torr的中等压力等离子体(Meso-plasma)兼具低气压冷等离子体和大气压热等离子体的优点,即具有比较高的等离子体密度和较低气体温度下的高化学反应活性.因此,这种等离子体源有望提供一种新的等离子体材料处理手段1.随着环境压力的降低,电子与重粒子间的能量交换效率会显著降低,从而导致等离子体明显偏离局域热力学平衡状态.
钙钛矿结构氧化物BiFeO3(BFO)同时具有铁电性和反铁磁性,由于其铁电和反铁磁相变温度均远高于室温(TC~1100 K,TN~643 K),极具研究和应用价值,成为了迄今为止最受关注的多铁材料。本文以第一性原理计算为主要手段,对呈C1型和G型反铁磁序沿[001]极化取向的四方向BFO的能带结构和光学性质展开了系统地研究。
自从量子自旋霍尔效应首次在(Hg,Cd)Te 量子阱中被发现以来,人们认为类似于HgTe这种具有“反带”结构的性质,是拓扑绝缘体形成的前提条件.传统的半导体材料中,导带的最低点都是由阳离子的s轨道电子所占据,即Γ6,而价带的最高点则是由阴离子p轨道电子所占据.由于重原子存在较强的自旋轨道相互作用,原本的一条带被劈裂成两条带,即Γ8、Γ7.而在具有“反带”结构的材料中,Γ6与Γ8的能量值恰好相反,汞
A new family of two-dimensional(2D)topological insulators(TIs),g-TlA(A = N,P,As,and Sb)monolayers,constructed by Tl and group V elements is predicted by first-principles calculations and molecule dyna
Approaching the glass transition of a metallic glass,the dramatic change of the dynamic properties still remains elusive from the microscopic aspect.In CuZr metallic glasses icosahedral clusters have