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采用自旋极化MS-xa方法,计算了铬离子(CrO6)10-的电子结构,给出了单电子本征值,本征函数,并用过渡态理论确定了基态组态,计算了部分光学跃迁和电荷转移跃迁的能量。 相似文献
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用不变量方法求含时谐振子的波函数 总被引:3,自引:1,他引:2
利用辅助方程从含量谐振子的哈密量出发得到了两个不变量,利用这两个不变量求得了系统薛定谔方程的解。 相似文献
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Temperature-controllable spin-polarized current and spin polarization in a Rashba three-terminal double-quantum-dot device
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We propose a Rashba three-terminal double-quantum-dot device to generate a spin-polarized current and manipulate the electron spin in each quantum dot by utilizing the temperature gradient instead of the electric bias voltage. This device possesses a nonresonant tunneling channel and two resonant tunneling channels. The Keldysh nonequilibrium Green's function techniques are employed to determinate the spin-polarized current flowing from the electrodes and the spin accumulation in each quantum dot. We find that their signs and magnitudes are well controllable by the gate voltage or the temperature gradient. This result is attributed to the change in the slope of the transmission probability at the Fermi levels in the low-temperature region. Importantly, an obviously pure spin current can be injected into or extracted from one of the three electrodes by properly choosing the temperature gradient and the gate voltages. Therefore, the device can be used as an ideal thermal generator to produce a pure spin current and manipulate the electron spin in the quantum dot. 相似文献
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We study the transport properties of electrons in a short homogeneous DNA molecule where thermal vibrations and twist fluctuations of the base molecules are considered. The nonlinear current-voltage curves can be derived by using the equivalent single-particle multichannel network. The voltage gap is sensitive to the strength of thermal vibrations and twist fluctuations of the base molecules. Our results are in good agreement with the recent finding of semiconducting behaviour in short poly(G)-poly(C) DNA oligomers. The present method can also be used to calculate the other molecular wires. 相似文献
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介绍了采用ArcMap生产"天地图·南昌"电子地图瓦片的数据处理流程,配图以及瓦片切片的技术,其中包括POI数据预处理、数据脱密、数据抽稀、符号库及配图模板制作,地图瓦片切片等步骤,最终实现了POI数据在电子地图中科学、合理、清晰、美观地表达.在制作的过程中,总结了POI数据处理及抽稀的经验及方法,提高了电子地图编制的技术水平,为类似电子地图项目的生产制作提供了一定的技术参考. 相似文献