一维平带晶格中的孤子
Solitons in one-dimensional lattices with a flat band
摘要：
我们研究了准一维晶格在两种可能的二聚构型下的光谱性质。这两种配置的特点是相同的晶格拓扑结构和相同的光谱包含一个平带在零能量。我们发现其中一种二聚构型与Su-Schrieffer-Heeger提出的研究共轭聚合物中孤子的一维链具有相似的对称性。而另一种二聚构型在绝热泵浦下才表现出非平凡的拓扑性质。
英文摘要：
We investigate the spectral properties of a quasi-one-dimensional lattice in two possible dimerisation configurations. Both configurations are characterized by the same lattice topology and the identical spectra containing a flat band at zero energy. We find that one of the dimerised configuration has similar symmetry to a one-dimensional chain proposed by Su-Schrieffer-Heeger for studying solitons in conjugated polymers. Whereas, the other dimerised configuration only shows non-trivial topological properties in the presence of chiral-symmetry breaking adiabatic pumping.
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