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Title: Dirac node arcs in PtSn 4

Abstract

In topological quantum materials 1,2,3 the conduction and valence bands are connected at points or along lines in the momentum space. A number of studies have demonstrated that several materials are indeed Dirac/Weyl semimetals 4,5,6,7,8. However, there is still no experimental confirmation of materials with line nodes, in which the Dirac nodes form closed loops in the momentum space 2,3. Here we report the discovery of a novel topological structure—Dirac node arcs—in the ultrahigh magnetoresistive material PtSn 4 using laser-based angle-resolved photoemission spectroscopy data and density functional theory calculations. Unlike the closed loops of line nodes, the Dirac node arc structure arises owing to the surface states and resembles the Dirac dispersion in graphene that is extended along a short line in the momentum space. Here, we propose that this reported Dirac node arc structure is a novel topological state that provides an exciting platform for studying the exotic properties of Dirac fermions.

Authors:
 [1];  [2]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1];  [1];  [2];  [1];  [1];  [1]
  1. Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States)
  2. Ames Lab., Ames, IA (United States)
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1253756
Report Number(s):
IS-J-8943
Journal ID: ISSN 1745-2473; nphys3712
Grant/Contract Number:  
AC02-07CH11358
Resource Type:
Accepted Manuscript
Journal Name:
Nature Physics
Additional Journal Information:
Journal Volume: 88; Journal Issue: 1-2; Journal ID: ISSN 1745-2473
Publisher:
Nature Publishing Group (NPG)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; electronic properties and materials; topological insulators

Citation Formats

Wu, Yun, Wang, Lin -Lin, Mun, Eundeok, Johnson, D. D., Mou, Daixiang, Huang, Lunan, Lee, Yongbin, Bud’ko, S. L., Canfield, P. C., and Kaminski, Adam. Dirac node arcs in PtSn4. United States: N. p., 2016. Web. doi:10.1038/nphys3712.
Wu, Yun, Wang, Lin -Lin, Mun, Eundeok, Johnson, D. D., Mou, Daixiang, Huang, Lunan, Lee, Yongbin, Bud’ko, S. L., Canfield, P. C., & Kaminski, Adam. Dirac node arcs in PtSn4. United States. doi:10.1038/nphys3712.
Wu, Yun, Wang, Lin -Lin, Mun, Eundeok, Johnson, D. D., Mou, Daixiang, Huang, Lunan, Lee, Yongbin, Bud’ko, S. L., Canfield, P. C., and Kaminski, Adam. Mon . "Dirac node arcs in PtSn4". United States. doi:10.1038/nphys3712. https://www.osti.gov/servlets/purl/1253756.
@article{osti_1253756,
title = {Dirac node arcs in PtSn4},
author = {Wu, Yun and Wang, Lin -Lin and Mun, Eundeok and Johnson, D. D. and Mou, Daixiang and Huang, Lunan and Lee, Yongbin and Bud’ko, S. L. and Canfield, P. C. and Kaminski, Adam},
abstractNote = {In topological quantum materials1,2,3 the conduction and valence bands are connected at points or along lines in the momentum space. A number of studies have demonstrated that several materials are indeed Dirac/Weyl semimetals4,5,6,7,8. However, there is still no experimental confirmation of materials with line nodes, in which the Dirac nodes form closed loops in the momentum space2,3. Here we report the discovery of a novel topological structure—Dirac node arcs—in the ultrahigh magnetoresistive material PtSn4 using laser-based angle-resolved photoemission spectroscopy data and density functional theory calculations. Unlike the closed loops of line nodes, the Dirac node arc structure arises owing to the surface states and resembles the Dirac dispersion in graphene that is extended along a short line in the momentum space. Here, we propose that this reported Dirac node arc structure is a novel topological state that provides an exciting platform for studying the exotic properties of Dirac fermions.},
doi = {10.1038/nphys3712},
journal = {Nature Physics},
number = 1-2,
volume = 88,
place = {United States},
year = {2016},
month = {4}
}

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