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Title: Experimental observation of Weyl points

Abstract

The massless solutions to the Dirac equation are described by the so-called Weyl Hamiltonian. The Weyl equation requires a particle to have linear dispersion in all three dimensions while being doubly degenerate at a single momentum point. These Weyl points are topological monopoles of quantized Berry flux exhibiting numerous unusual properties. We performed angle-resolved microwave transmission measurements through a double-gyroid photonic crystal with inversion-breaking where Weyl points have been theoretically predicted to occur. The excited bulk states show two linear dispersion bands touching at four isolated points in the three-dimensional Brillouin zone, indicating the observation of Weyl points. Here, we pave the way to a variety of photonic topological phenomena in three dimensions.

Authors:
 [1];  [2];  [2];  [2];  [1];  [1];  [1]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Physics
  2. Zhejiang Univ., Hangzhou, Zhejiang (China). Lab. of Applied Research on Electromagnetics (ARE)
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Solid-State Solar-Thermal Energy Conversion Center (S3TEC)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1370988
Grant/Contract Number:  
SC0001299; FG02-09ER46577
Resource Type:
Accepted Manuscript
Journal Name:
Science
Additional Journal Information:
Journal Volume: 349; Journal Issue: 6248; Related Information: S3TEC partners with Massachusetts Institute of Technology (lead); Boston College; Oak Ridge National Laboratory; Rensselaer Polytechnic Institute; Journal ID: ISSN 0036-8075
Publisher:
AAAS
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; solar (photovoltaic); solar (thermal); solid state lighting; phonons; thermal conductivity; thermoelectric; defects; mechanical behavior; charge transport; spin dynamics; materials and chemistry by design; optics; synthesis (novel materials); synthesis (self-assembly); synthesis (scalable processing)

Citation Formats

Lu, Ling, Wang, Zhiyu, Ye, Dexin, Ran, Lixin, Fu, Liang, Joannopoulos, John D., and Soljačić, Marin. Experimental observation of Weyl points. United States: N. p., 2019. Web. doi:10.1126/science.aaa9273.
Lu, Ling, Wang, Zhiyu, Ye, Dexin, Ran, Lixin, Fu, Liang, Joannopoulos, John D., & Soljačić, Marin. Experimental observation of Weyl points. United States. doi:10.1126/science.aaa9273.
Lu, Ling, Wang, Zhiyu, Ye, Dexin, Ran, Lixin, Fu, Liang, Joannopoulos, John D., and Soljačić, Marin. Wed . "Experimental observation of Weyl points". United States. doi:10.1126/science.aaa9273. https://www.osti.gov/servlets/purl/1370988.
@article{osti_1370988,
title = {Experimental observation of Weyl points},
author = {Lu, Ling and Wang, Zhiyu and Ye, Dexin and Ran, Lixin and Fu, Liang and Joannopoulos, John D. and Soljačić, Marin},
abstractNote = {The massless solutions to the Dirac equation are described by the so-called Weyl Hamiltonian. The Weyl equation requires a particle to have linear dispersion in all three dimensions while being doubly degenerate at a single momentum point. These Weyl points are topological monopoles of quantized Berry flux exhibiting numerous unusual properties. We performed angle-resolved microwave transmission measurements through a double-gyroid photonic crystal with inversion-breaking where Weyl points have been theoretically predicted to occur. The excited bulk states show two linear dispersion bands touching at four isolated points in the three-dimensional Brillouin zone, indicating the observation of Weyl points. Here, we pave the way to a variety of photonic topological phenomena in three dimensions.},
doi = {10.1126/science.aaa9273},
journal = {Science},
number = 6248,
volume = 349,
place = {United States},
year = {2019},
month = {8}
}

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Cited by: 491 works
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