排序方式: 共有39条查询结果,搜索用时 15 毫秒
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我们在44周期性正方格点对SU(2)-Y(120)群Group Space Decimation有效近似作用量进行了Monte Carlo模拟, 发现有效作用量系统在β≤9没有凝固点, 但有效作用量系统的内能曲线与SU(2) Wilson作用量的内能曲线有差别. 这说明, 虽然Group Space Decimation方法原则上可使分立子群代替连续群进行Monte Carlo模拟, 但就减少计算机模拟时间来说不是非常有效. 相似文献
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A possible superconducting mechanism of the hole-doped C60 solid is discussed. Under the assumption that the superconductivity results from the strong coupling between electrons at Fermi surface and intramolecular vibrations, a simple expression for the electron-phonon coupling parameter λ is derived. The related transition temperature is estimated and can be much greater than that of the alkali-metal-doped C60 solid. 相似文献
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一种节状纳米碳纤维的CVD生长 总被引:2,自引:0,他引:2
介绍了以发泡Ni为催化剂、用CVD法生长节状纳米碳纤维的工艺过程,讨论了工艺参数对生成样品的产率和形貌的影响,同时还探讨了该样品的生长机理。认为催化剂的不同晶面分别有利于烃类气体的吸附解离或碳的沉积,因此催化剂颗粒的原始形貌影响了不同开貌的碳纤维生长。 相似文献
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A possible superconducting mechanism of the hole-doped C60 solid is discussed. Under the assumption that the superconductivity results from the strong coupling between electrons at Fermi surface and intramolecular vibrations, a simple expression for the electron-phonon coupling parameter λ is derived. The related transition temperature is estimated and can be much greater than that of the alkali-metal-doped C60 solid. 相似文献
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我们对SU(2)群格点规范理论的Sinl-Sin((1/2)TrUp)作用量做了有限温度下的Monte Carlo计算,观察到一个高温下解除禁闭的相变。临界点是Tc≈334±40Mev,这与使用Wilson作用量及其它类型作用量所得结果可以相容。 相似文献
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