双电子温度在低压汞灯的交流动态模型中的应用

本文对日本Ｗａｎｉ的低压汞煤在交流动态情况下的放电机理的理论进行了一些个在，并简化了其中的计算处理过程，使得原来需小型计算机才能完成的计算在微机上得以完成。

Unusual Charge Transport and Spin Response of Doped Bilayer Triangular Antiferromagnets

Within the t-J model, the charge transport and spin response of the doped bilayer triangular antiferromagnetare studied by considering the bilayer interaction. Although the bilayer interaction leads to the band splitting in theelectronic structure, the qualitative behaviors of the physical properties are the same as in the single layer case. Theconductivity spectrum shows the low-energy peak and unusual midinfrared band, the temperature-dependent resistivityis characterized by the nonlinearity metallic-like behavior in the higher temperature range and the deviation from themetallic-like behavior in the lower temperature range and the commensurate neutron scattering peak near the half-fillingis split into six incommensurate peaks in the underdoped regime, with the incommensurability increasing with the holeconcentration at lower dopings, and saturating at higher dopings.

纳秒与飞秒激光作用下纳米金棒光热效应的理论与实验研究

纳米金颗粒可以有效增强激光诱导光学击穿效应,但不同脉冲激光下激光诱导光学击穿的机理不同。为了从微观角度揭示纳秒和飞秒激光照射纳米金颗粒过程中颗粒内部的光热转换和环境介质的变化,建立了脉冲激光加热水介质中纳米金棒的电子-声子双温度模型,结合实验研究,分析了不同激光能量密度和脉冲宽度对光热转换过程的影响,以及纳米金棒微观熔化特性的差异。结果显示,纳秒和飞秒激光照射下纳米金棒内部的电子和晶格温度的变化趋势基本一致。飞秒激光照射时纳米金棒的熔化阈值约为纳秒激光照射时的1%,纳秒激光照射时纳米金棒周围的水温更高。飞秒激光照射时纳米金棒形貌的改变主要以机械碎裂为主,而纳秒激光作用下则主要以热致纳米金棒熔化为主。