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| VOLUME 117 (2023) | ISSUE 10 | PAGE 794 |
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Emergent long-lived Zitterbewegung in Su-Schrieffer-Heeger lattice with third-nearest-neighbor hopping
M.-N. Chen+, X.-J. Yu*, Z. Li+×°
+Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, SPTE, South China Normal University, 510006 Guangzhou, China *International Center for Quantum Materials, School of Physics, Peking University, 100871 Beijing, China ×Guangdong-Hong Kong Joint Laboratory of Quantum Matter, Frontier Research Institute for Physics, South China Normal University, 510006 Guangzhou, China °Guangdong Provincial Key Laboratory of Nuclear Science, Institute of Quantum Matter, South China Normal University, 510006 Guangzhou, China
Abstract
We investigate the wavepacket dynamics of quasiparticles in a Su-Schrieffer-Heeger lattice with third-nearest-neighbor hopping. The results reveal that the life-span of Zitterbewegung can be prolonged. To better understand the mechanism, we discuss the band structure and the long-time average of inverse participation rate. The results show that the band structure can be effectively manipulated as a quasi-flat band by introducing the third-nearest-neighbor hopping. This, as a unique advantage over the standard Su-Schrieffer-Heeger model, will bring about restrained diffusion of the wavepacket as well as dramatically stretched life-span of Zitterbewegung, thus will promise wide applications in condensed matter physics. |