Valley physics in phononic crystals

来源 :光子和声音的未来方向研讨会(Future Directions of Photonics and Phononics) | 被引量 : 0次 | 上传用户：jorry1983

【摘要】

：

　　Phononic crystals(PCs)are artificial periodical structures for acoustic waves with frequency bands in momentum space.Dirac conic dispersions can be found at

【作者】

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Zhengyou Liu

【机构】

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SchoolofPhysicsandTechnology,WuhanUniversity

【出处】

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光子和声音的未来方向研讨会(Future Directions of Photonics and Phononics)

【发表日期】

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2017年12期

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　　Phononic crystals(PCs)are artificial periodical structures for acoustic waves with frequency bands in momentum space.Dirac conic dispersions can be found at the Brillouin zone of 2D PCs with hexagonal lattice.By breaking the symmetry of the PCs,the degeneracies at two Dirac points can be lifted and bandgaps open,resulting in two inequivalent valleys with states of opposite vortices.

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Valley physics in phononic crystals

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