排序方式: 共有29条查询结果,搜索用时 312 毫秒
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我们采用周期性Anderson模型哈密顿量解释了在低压下重费密子系统CeAl3的低温比热随压力变化的实验结果。
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我的老师黄祖洽院士生于1924年10月2日,今年10月2日是他的80岁生日.黄先生是我国著名的物理学家,他早年进入西南联合大学物理系学习,1950年毕业于清华大学研究院,是新中国成立后从清华大学毕业的第一位研究生.自研究生毕业后至1980年,黄先生先后任职于中国科学院近代物理研究所(后相继改名为中国科学院物理研究所、中国科学院原子能研究所和中国原子能科学研究院)、中国原子能科学研究院和中国工程物理研究院第九研究所等单位,他和彭桓武先生是我国核反 相似文献
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We study the topological properties of a one-dimensional (1D) hardcore Bose-Fermi mixture using the exact diagonalization method. We firstly add a hardcore boson to a fermionic system and by examining the edge states we find that the quasi-particle manifests the topological properties of the system. Then we study a mixture with 7 fermions and 1 boson. We find that the mixture also exhibits topological properties and its behaviors are similar to that of the corresponding fermionic system. We present a qualitative explanation to understand such behaviors using the mapping between a hardcore boson and a spinless fermion. These results show the existence of topological properties in a 1D hardcore Bose-Fermi mixture and may be realized using cold atoms trapped in optical lattices experimentally. 相似文献
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The robustness of the quantum spin Hall effect to the thickness fluctuation in HgTe quantum wells 下载免费PDF全文
The quantum spin Hall effect(QSHE) was first realized in HgTe quantum wells(QWs),which remain the only known two-dimensional topological insulator so far.In this paper,we have systematically studied the effect of the thickness fluctuation of HgTe QWs on the QSHE.We start with the case of constant mass with random distributions,and reveal that the disordered system can be well described by a virtual uniform QW with an effective mass when the number of components is small.When the number is infinite and corresponds to the real fluctuation,we find that the QSHE is not only robust,but also can be generated by relatively strong fluctuation.Our results imply that the thickness fluctuation does not cause backscattering,and the QSHE is robust to it. 相似文献
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采用Green函数技术,我们讨论了温度从T=0直到T=Tc范围内铁磁体表面和界面的磁化强度随温度的变化情况,所得到表面磁化强度的结果与其他作者的结果一致;而在界面计算中,我们发现界面的Tc与体内的不同,并且找到了一个关系式:TccA,TcB)。
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