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Topological negative refraction of surface acoustic waves in a Weyl phononic crystal

Overview of attention for article published in Nature, August 2018
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  • In the top 5% of all research outputs scored by Altmetric
  • High Attention Score compared to outputs of the same age (93rd percentile)

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3 news outlets
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1 blog
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1 policy source
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11 X users

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Title
Topological negative refraction of surface acoustic waves in a Weyl phononic crystal
Published in
Nature, August 2018
DOI 10.1038/s41586-018-0367-9
Pubmed ID
Authors

Hailong He, Chunyin Qiu, Liping Ye, Xiangxi Cai, Xiying Fan, Manzhu Ke, Fan Zhang, Zhengyou Liu

Abstract

Reflection and refraction of waves occur at the interface between two different media. These two fundamental interfacial wave phenomena form the basis of fabricating various wave components, such as optical lenses. Classical refraction-now referred to as positive refraction-causes the transmitted wave to appear on the opposite side of the interface normal compared to the incident wave. By contrast, negative refraction results in the transmitted wave emerging on the same side of the interface normal. It has been observed in artificial materials1-5, following its theoretical prediction6, and has stimulated many applications including super-resolution imaging7. In general, reflection is inevitable during the refraction process, but this is often undesirable in designing wave functional devices. Here we report negative refraction of topological surface waves hosted by a Weyl phononic crystal-an acoustic analogue of the recently discovered Weyl semimetals8-12. The interfaces at which this topological negative refraction occurs are one-dimensional edges separating different facets of the crystal. By tailoring the surface terminations of the Weyl phononic crystal, constant-frequency contours of surface acoustic waves can be designed to produce negative refraction at certain interfaces, while positive refraction is realized at different interfaces within the same sample. In contrast to the more familiar behaviour of waves at interfaces, unwanted reflection can be prevented in our crystal, owing to the open nature of the constant-frequency contours, which is a hallmark of the topologically protected  surface states in Weyl crystals8-12.

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Mendeley readers

Mendeley readers

The data shown below were compiled from readership statistics for 180 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 180 100%

Demographic breakdown

Readers by professional status Count As %
Student > Ph. D. Student 53 29%
Student > Master 22 12%
Researcher 20 11%
Professor 12 7%
Student > Doctoral Student 11 6%
Other 24 13%
Unknown 38 21%
Readers by discipline Count As %
Physics and Astronomy 65 36%
Engineering 37 21%
Materials Science 13 7%
Chemistry 6 3%
Agricultural and Biological Sciences 3 2%
Other 11 6%
Unknown 45 25%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 36. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 01 June 2023.
All research outputs
#1,129,104
of 25,540,105 outputs
Outputs from Nature
#33,769
of 98,213 outputs
Outputs of similar age
#23,667
of 342,304 outputs
Outputs of similar age from Nature
#686
of 946 outputs
Altmetric has tracked 25,540,105 research outputs across all sources so far. Compared to these this one has done particularly well and is in the 95th percentile: it's in the top 5% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 98,213 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 102.6. This one has gotten more attention than average, scoring higher than 65% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 342,304 tracked outputs that were published within six weeks on either side of this one in any source. This one has done particularly well, scoring higher than 93% of its contemporaries.
We're also able to compare this research output to 946 others from the same source and published within six weeks on either side of this one. This one is in the 27th percentile – i.e., 27% of its contemporaries scored the same or lower than it.