Electrically tunable multiple Dirac cones in thin films of the (Lao) 2 (SbSe 2 ) 2 family of materials

Xiao Yu Dong, Jian Feng Wang, Rui Xing Zhang, Wen Hui Duan, Bang Fen Zhu, Jorge Osvaldo Sofo, Chaoxing Liu

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Two-dimensional Dirac physics has aroused great interests in condensed matter physics ever since the discovery of graphene and topological insulators. The ability to control the properties of Dirac cones, such as bandgap and Fermi velocity, is essential for various new phenomena and the next-generation electronic devices. On the basis of first-principles calculations and an analytical effective model, we propose a new Dirac system with eight Dirac cones in thin films of the (LaO) 2 (SbSe 2 ) 2 family of materials, which has the advantage in its tunability: the existence of gapless Dirac cones, their positions, Fermi velocities and anisotropy all can be controlled by an experimentally feasible electric field. We identify layer-dependent spin texture induced by spin-orbit coupling as the underlying physical reason for electrical tunability of this system. Furthermore, the electrically tunable quantum anomalous Hall effect with a high Chern number can be realized by introducing magnetization into this system.

Original languageEnglish (US)
Article number8517
JournalNature communications
Volume6
DOIs
StatePublished - Oct 13 2015

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Laos
Physics
Cones
cones
Thin films
Graphite
Anisotropy
Orbit
thin films
Condensed matter physics
Quantum Hall effect
condensed matter physics
Equipment and Supplies
Hall effect
Analytical models
Magnetization
graphene
Orbits
Energy gap
textures

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

Cite this

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abstract = "Two-dimensional Dirac physics has aroused great interests in condensed matter physics ever since the discovery of graphene and topological insulators. The ability to control the properties of Dirac cones, such as bandgap and Fermi velocity, is essential for various new phenomena and the next-generation electronic devices. On the basis of first-principles calculations and an analytical effective model, we propose a new Dirac system with eight Dirac cones in thin films of the (LaO) 2 (SbSe 2 ) 2 family of materials, which has the advantage in its tunability: the existence of gapless Dirac cones, their positions, Fermi velocities and anisotropy all can be controlled by an experimentally feasible electric field. We identify layer-dependent spin texture induced by spin-orbit coupling as the underlying physical reason for electrical tunability of this system. Furthermore, the electrically tunable quantum anomalous Hall effect with a high Chern number can be realized by introducing magnetization into this system.",
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Electrically tunable multiple Dirac cones in thin films of the (Lao) 2 (SbSe 2 ) 2 family of materials . / Dong, Xiao Yu; Wang, Jian Feng; Zhang, Rui Xing; Duan, Wen Hui; Zhu, Bang Fen; Sofo, Jorge Osvaldo; Liu, Chaoxing.

In: Nature communications, Vol. 6, 8517, 13.10.2015.

Research output: Contribution to journalArticle

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AU - Dong, Xiao Yu

AU - Wang, Jian Feng

AU - Zhang, Rui Xing

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AU - Zhu, Bang Fen

AU - Sofo, Jorge Osvaldo

AU - Liu, Chaoxing

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