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Hidden symmetry and protection of Dirac points on the honeycomb lattice.

The honeycomb lattice possesses a novel energy band structure, which is characterized by two distinct Dirac points in the Brillouin zone, dominating most of the physical properties of the honeycomb structure materials. However, up till now, the origin of the Dirac points is unclear yet. Here, we dis... Full description

Journal Title: Scientific reports December 7, 2015, Vol.5, p.17571
Main Author: Hou, Jing-Min
Other Authors: Chen, Wei
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: E-ISSN: 2045-2322 ; DOI: 10.1038/srep17571
Link: http://search.proquest.com/docview/1746872101/?pq-origsite=primo
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recordid: proquest1746872101
title: Hidden symmetry and protection of Dirac points on the honeycomb lattice.
format: Article
creator:
  • Hou, Jing-Min
  • Chen, Wei
subjects:
  • Condensed Matter - Materials Science
  • Condensed Matter - Strongly Correlated Electrons
ispartof: Scientific reports, December 7, 2015, Vol.5, p.17571
description: The honeycomb lattice possesses a novel energy band structure, which is characterized by two distinct Dirac points in the Brillouin zone, dominating most of the physical properties of the honeycomb structure materials. However, up till now, the origin of the Dirac points is unclear yet. Here, we discover a hidden symmetry on the honeycomb lattice and prove that the existence of Dirac points is exactly protected by such hidden symmetry. Furthermore, the moving and merging of the Dirac points and a quantum phase transition, which have been theoretically predicted and experimentally observed on the honeycomb lattice, can also be perfectly explained by the parameter dependent evolution of the hidden symmetry. Comment: 5 pages, 2 figures, +6 pages of supplementary information. Welcome any comments!
language: eng
source:
identifier: E-ISSN: 2045-2322 ; DOI: 10.1038/srep17571
fulltext: fulltext
issn:
  • 20452322
  • 2045-2322
url: Link


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descriptionThe honeycomb lattice possesses a novel energy band structure, which is characterized by two distinct Dirac points in the Brillouin zone, dominating most of the physical properties of the honeycomb structure materials. However, up till now, the origin of the Dirac points is unclear yet. Here, we discover a hidden symmetry on the honeycomb lattice and prove that the existence of Dirac points is exactly protected by such hidden symmetry. Furthermore, the moving and merging of the Dirac points and a quantum phase transition, which have been theoretically predicted and experimentally observed on the honeycomb lattice, can also be perfectly explained by the parameter dependent evolution of the hidden symmetry. Comment: 5 pages, 2 figures, +6 pages of supplementary information. Welcome any comments!
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