| Quantum geometric tensor and the topological characterization of the extended Su–Schrieffer–Heeger model |
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| 引用本文： | 曾相龙,赖文喜,魏祎雯,马余全.Quantum geometric tensor and the topological characterization of the extended Su–Schrieffer–Heeger model[J].中国物理 B,2024(3):301-306. |
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| 作者姓名： | 曾相龙 赖文喜 魏祎雯 马余全 |
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| 基金项目： | Project supported by the Beijing Natural Science Foundation (Grant No. 1232026)；;the National Natural Science Foundation of China (Grant No. 12304190)； |
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| 摘 要： | We investigate the quantum metric and topological Euler number in a cyclically modulated Su–Schrieffer–Heeger(SSH) model with long-range hopping terms. By computing the quantum geometry tensor, we derive exact expressions for the quantum metric and Berry curvature of the energy band electrons, and we obtain the phase diagram of the model marked by the first Chern number. Furthermore, we also obtain the topological Euler number of the energy band based on the Gauss–Bonnet theorem on the topologic...
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