Control of Giant Topological Magnetic Moment and Valley Splitting in Trilayer GrapheneCitation formats

  • External authors:
  • Zhehao Ge
  • Fredric Joucken
  • Eberth A. Quezada
  • Takashi Taniguchi
  • Kenji Watanabe
  • Jairo Velasco Jr

Standard

Control of Giant Topological Magnetic Moment and Valley Splitting in Trilayer Graphene. / Ge, Zhehao; Slizovskiy, Sergey; Joucken, Fredric; Quezada, Eberth A.; Taniguchi, Takashi; Watanabe, Kenji; Falko, Vladimir I.; Jr, Jairo Velasco.

In: Physical Review Letters, 23.09.2021.

Research output: Contribution to journalArticlepeer-review

Harvard

APA

Ge, Z., Slizovskiy, S., Joucken, F., Quezada, E. A., Taniguchi, T., Watanabe, K., Falko, V. I., & Jr, J. V. (2021). Control of Giant Topological Magnetic Moment and Valley Splitting in Trilayer Graphene. Physical Review Letters. https://doi.org/10.1103/PhysRevLett.127.136402

Vancouver

Ge Z, Slizovskiy S, Joucken F, Quezada EA, Taniguchi T, Watanabe K et al. Control of Giant Topological Magnetic Moment and Valley Splitting in Trilayer Graphene. Physical Review Letters. 2021 Sep 23. https://doi.org/10.1103/PhysRevLett.127.136402

Author

Ge, Zhehao ; Slizovskiy, Sergey ; Joucken, Fredric ; Quezada, Eberth A. ; Taniguchi, Takashi ; Watanabe, Kenji ; Falko, Vladimir I. ; Jr, Jairo Velasco. / Control of Giant Topological Magnetic Moment and Valley Splitting in Trilayer Graphene. In: Physical Review Letters. 2021.

Bibtex

@article{9dd113838b39450ebc0c86a36e38830f,
title = "Control of Giant Topological Magnetic Moment and Valley Splitting in Trilayer Graphene",
abstract = "Bloch states of electrons in honeycomb two-dimensional crystals with multi-valley band structure and broken inversion symmetry have orbital magnetic moments of a topological nature. In crystals with two degenerate valleys, a perpendicular magnetic field lifts the valley degeneracy via a Zeeman effect due to these magnetic moments, leading to magnetoelectric effects which can be leveraged for creating valleytronic devices. In this work, we demonstrate that trilayer graphene with Bernal stacking (ABA TLG), hosts topological magnetic moments with a large and widely tunable valley g-factor, reaching a value ~1050 at the extreme of the studied parametric range. The reported experiment consists in sublattice-resolved scanning tunneling spectroscopy under perpendicular electric and magnetic fields that control the TLG bands. The tunneling spectra agree very well with the results of theoretical modelling that includes the full details of the TLG tight-binding model and accounts for a quantum-dot-like potential profile formed electrostatically under the scanning tunneling microscope tip. ",
keywords = "cond-mat.mes-hall, cond-mat.mtrl-sci",
author = "Zhehao Ge and Sergey Slizovskiy and Fredric Joucken and Quezada, {Eberth A.} and Takashi Taniguchi and Kenji Watanabe and Falko, {Vladimir I.} and Jr, {Jairo Velasco}",
year = "2021",
month = sep,
day = "23",
doi = "10.1103/PhysRevLett.127.136402",
language = "English",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",

}

RIS

TY - JOUR

T1 - Control of Giant Topological Magnetic Moment and Valley Splitting in Trilayer Graphene

AU - Ge, Zhehao

AU - Slizovskiy, Sergey

AU - Joucken, Fredric

AU - Quezada, Eberth A.

AU - Taniguchi, Takashi

AU - Watanabe, Kenji

AU - Falko, Vladimir I.

AU - Jr, Jairo Velasco

PY - 2021/9/23

Y1 - 2021/9/23

N2 - Bloch states of electrons in honeycomb two-dimensional crystals with multi-valley band structure and broken inversion symmetry have orbital magnetic moments of a topological nature. In crystals with two degenerate valleys, a perpendicular magnetic field lifts the valley degeneracy via a Zeeman effect due to these magnetic moments, leading to magnetoelectric effects which can be leveraged for creating valleytronic devices. In this work, we demonstrate that trilayer graphene with Bernal stacking (ABA TLG), hosts topological magnetic moments with a large and widely tunable valley g-factor, reaching a value ~1050 at the extreme of the studied parametric range. The reported experiment consists in sublattice-resolved scanning tunneling spectroscopy under perpendicular electric and magnetic fields that control the TLG bands. The tunneling spectra agree very well with the results of theoretical modelling that includes the full details of the TLG tight-binding model and accounts for a quantum-dot-like potential profile formed electrostatically under the scanning tunneling microscope tip.

AB - Bloch states of electrons in honeycomb two-dimensional crystals with multi-valley band structure and broken inversion symmetry have orbital magnetic moments of a topological nature. In crystals with two degenerate valleys, a perpendicular magnetic field lifts the valley degeneracy via a Zeeman effect due to these magnetic moments, leading to magnetoelectric effects which can be leveraged for creating valleytronic devices. In this work, we demonstrate that trilayer graphene with Bernal stacking (ABA TLG), hosts topological magnetic moments with a large and widely tunable valley g-factor, reaching a value ~1050 at the extreme of the studied parametric range. The reported experiment consists in sublattice-resolved scanning tunneling spectroscopy under perpendicular electric and magnetic fields that control the TLG bands. The tunneling spectra agree very well with the results of theoretical modelling that includes the full details of the TLG tight-binding model and accounts for a quantum-dot-like potential profile formed electrostatically under the scanning tunneling microscope tip.

KW - cond-mat.mes-hall

KW - cond-mat.mtrl-sci

U2 - 10.1103/PhysRevLett.127.136402

DO - 10.1103/PhysRevLett.127.136402

M3 - Article

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

ER -