Competition between super uid order and charge-density-wave order in SU(N) disordered attractive Fermi systems
Competition between super uid order and charge-density-wave order in SU(N) disordered attractive Fermi systems
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SU(N)无序吸引费米系统中超流体序与电荷密度波序的竞争
DOI：
10.1088/1742-6596/592/1/012104
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
川上則雄
中科院分区：
文献类型：
--
作者：
阪井田賢;川上則雄
用Bogoliubov-de Gennes方法研究了N= 3和N= 4的SU（N）Fermi系统的无序性.在我们以前的工作[1]中，我们着重研究了弱无序区系统的性质，发现由无序引起的空间不均匀性诱导了电荷密度波（CDW）-超流（SF）相变。虽然也有人提出，SF和安德森局域态（AL）之间的过渡N= 3和CDW-AL过渡N= 4，即使在强无序区，每个相变的性质没有讨论。在本文中，我们提出的结果，没有解决在参考。[1]并阐明这些相变中的每一个是一阶的还是二阶的。
SU (N) Fermi systems with disorder are studied within the Bogoliubov-de Gennes method for the N= 3 and N= 4 cases. In our previous work [1], we focused on the properties of systems in the weakly-disordered region and found that the spatial nonuniformity caused by disorder induces the charge-density-wave (CDW)-superfluid (SF) transition. Though it was also suggested that a transition between the SF and the Anderson localized state (AL) for N= 3 and the CDW-AL transition for N= 4 would occur even in the strongly-disordered region, the nature of each phase transition was not discussed. In this paper, we present the results which were not addressed in Ref.[1] and clarify whether each of these phase transitions is of first-order or of second-order.