Topological sound. Issue 1 (December 2018)

• Record Type: Journal Article
• Authors: Zhang, Xiujuan; Xiao, Meng; Cheng, Ying; Lu, Ming-Hui; Christensen, Johan
• Is Part Of: Communications physics. Volume 1:Issue 1(2018)
• Page Start: 1
• Page End: 13
• Publication Date: 2018-12
• Subjects: Physics -- Periodicals; 530
• DOI: 10.1038/s42005-018-0094-4
• Languages: English
• ISSNs: 2399-3650

Abstract

Abstract Recently, we witnessed a tremendous effort to conquer the realm of acoustics as a possible playground to test with topologically protected sound wave propagation. In this article, we review the latest efforts to explore with sound waves topological states of quantum matter in two- and three-dimensional systems where we discuss how spin and valley degrees of freedom appear as highly novel ingredients to tailor the flow of sound in the form of one-way edge modes and defect-immune protected acoustic waves. Both from a theoretical stand point and based on contemporary experimental verifications, we summarize the latest advancements of the flourishing research frontier on topological sound. For both fundamental and applied sciences topological states of matter is an area of intense research and most investigations are dedicated to realizing these materials using electronic and optical methods. Here the authors review recent efforts in a third avenue of research which seeks to emulate topological states using acoustics.