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Topological quantum states have attracted great attention both theoretically and experimentally.Here,we show that the momentum-space lattice allows us to couple two Su-Schrieffer-Heeger(SSH)chains with opposite dimerizations and staggered interleg hoppings.The coupled SSH chain is a four-band model which has sublattice symmetry similar to the SSH4.Interestingly,the topological edge states occupy two sublattices at the same time,which can be regarded as a one-dimension analogue of the type-II corner state.The analytical expressions of the edge states are also obtained by solving the eigenequations.Finally,we provide a possible experimental scheme to detect the topological winding number and corresponding edge states. 相似文献
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童增祥博士(ztong@otterbein.edu)是美国第一位教育数学的讲座教授.他于2015年秋给奥特本大学(Otterbein University)数学系新生的信,融合了中国和美国的教育观念,对大学新生的数学学习方法做了深入的剖析.特此译出,供我国大学生们参考. 相似文献
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