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  Stable Dirac semimetal in the allotropes of group-IV elements

Cao, W., Tang, P., Zhang, S.-C., Duan, W., & Rubio, A. (2016). Stable Dirac semimetal in the allotropes of group-IV elements. Physical Review B, 93(24): 241117(R). doi:10.1103/PhysRevB.93.241117.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-6CD6-E Version Permalink: http://hdl.handle.net/21.11116/0000-0004-917D-C
Genre: Journal Article

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PhysRevB.93.241117.pdf (Publisher version), 3MB
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http://arxiv.org/abs/1601.05523 (Preprint)
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http://dx.doi.org/10.1103/PhysRevB.93.241117 (Publisher version)
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 Creators:
Cao, Wendong1, Author
Tang, Peizhe2, Author
Zhang, Shou-Cheng2, Author
Duan, Wenhui1, 2, 3, 4, Author
Rubio, Angel5, 6, 7, Author              
Affiliations:
1State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, People’s Republic of China, ou_persistent22              
2Department of Physics, McCullough Building, Stanford University, Stanford, California 94305-4045, USA, ou_persistent22              
3Institute for Advanced Study, Tsinghua University, Beijing 100084, People’s Republic of China, ou_persistent22              
4Collaborative Innovation Center of Quantum Matter, Beijing 100084, People’s Republic of China, ou_persistent22              
5Center for Free-Electron Laser Science, Luruper Chaussee 149, 22761 Hamburg, Germany, ou_persistent22              
6Nano-Bio Spectroscopy group, Dpto. Física de Materiales, Universidad del País Vasco, Centro de Física de Materiales CSIC-UPV/EHU-MPC and DIPC, Av. Tolosa 72, E-20018 San Sebastián, Spain, ou_persistent22              
7Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              

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Free keywords: Condensed Matter; Materials Science; Mesoscale and Nanoscale Physics
 Abstract: Three-dimensional topological Dirac semimetals represent a novel state of quantum matter with exotic electronic properties, in which a pair of Dirac points with a linear dispersion along all momentum directions exists in the bulk. Herein, by using first-principles calculations, we discover the metastable allotropes of Ge and Sn in the staggered layered dumbbell structure, named germancite and stancite, to be Dirac semimetals with a pair of Dirac points on their rotation axis. On the surface parallel to the rotation axis, a pair of topologically nontrivial Fermi arcs are observed and a Lifshitz transition is found by tuning the Fermi level. Furthermore, the quantum thin film of germancite is found to be an intrinsic quantum spin Hall insulator. These discoveries suggest novel physical properties and future applications of the metastable allotrope of Ge and Sn.

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Language(s): eng - English
 Dates: 2016-01-212016-01-102016-06-272016-06-15
 Publication Status: Published in print
 Pages: 6
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: arXiv: 1601.05523
DOI: 10.1103/PhysRevB.93.241117
 Degree: -

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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 93 (24) Sequence Number: 241117(R) Start / End Page: - Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008