Back to Search
Start Over
Experimental characterization of fragile topology in an acoustic metamaterial.
- Source :
-
Science (New York, N.Y.) [Science] 2020 Feb 14; Vol. 367 (6479), pp. 797-800. - Publication Year :
- 2020
-
Abstract
- Symmetries crucially underlie the classification of topological phases of matter. Most materials, both natural as well as architectured, possess crystalline symmetries. Recent theoretical works unveiled that these crystalline symmetries can stabilize fragile Bloch bands that challenge our very notion of topology: Although answering to the most basic definition of topology, one can trivialize these bands through the addition of trivial Bloch bands. Here, we fully characterize the symmetry properties of the response of an acoustic metamaterial to establish the fragile nature of the low-lying Bloch bands. Additionally, we present a spectral signature in the form of spectral flow under twisted boundary conditions.<br /> (Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works.)
Details
- Language :
- English
- ISSN :
- 1095-9203
- Volume :
- 367
- Issue :
- 6479
- Database :
- MEDLINE
- Journal :
- Science (New York, N.Y.)
- Publication Type :
- Academic Journal
- Accession number :
- 32054764
- Full Text :
- https://doi.org/10.1126/science.aaz7654