Topological van Hove singularities at phase transitions in Weyl metals

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Topological van Hove singularities at phase transitions in Weyl metals. / Fontana, Pierpaolo; Burrello, Michele; Trombettoni, Andrea.

In: Physical Review B, Vol. 104, No. 19, 195127, 15.11.2021.

Research output: Contribution to journal › Journal article › Research › peer-review

Harvard

Fontana, P, Burrello, M & Trombettoni, A 2021, 'Topological van Hove singularities at phase transitions in Weyl metals', Physical Review B, vol. 104, no. 19, 195127. https://doi.org/10.1103/PhysRevB.104.195127

APA

Fontana, P., Burrello, M., & Trombettoni, A. (2021). Topological van Hove singularities at phase transitions in Weyl metals. Physical Review B, 104(19), [195127]. https://doi.org/10.1103/PhysRevB.104.195127

Vancouver

Fontana P, Burrello M, Trombettoni A. Topological van Hove singularities at phase transitions in Weyl metals. Physical Review B. 2021 Nov 15;104(19). 195127. https://doi.org/10.1103/PhysRevB.104.195127

Author

Fontana, Pierpaolo ; Burrello, Michele ; Trombettoni, Andrea. / Topological van Hove singularities at phase transitions in Weyl metals. In: Physical Review B. 2021 ; Vol. 104, No. 19.

Bibtex

@article{3cd58d89f18644b1b78e7f413cf8e839,
title = "Topological van Hove singularities at phase transitions in Weyl metals",
abstract = "We show that in three-dimensional (3D) topological metals, a subset of the van Hove singularities of the density of states sits exactly at the transitions between topological and trivial gapless phases. We may refer to these as topological van Hove singularities. By investigating two minimal models, we show that they originate from energy saddle points located between Weyl points with opposite chiralities, and we illustrate their topological nature through their magnetotransport properties in the ballistic regime. We exemplify the relation between van Hove singularities and topological phase transitions in Weyl systems by analyzing the 3D Hofstadter model, which offers a simple and interesting playground to consider different kinds of Weyl metals and to understand the features of their density of states. In this model, as a function of the magnetic flux, the occurrence of topological van Hove singularities can be explicitly checked.",
keywords = "SEMIMETAL, FERMIONS, STATES, BAND",
author = "Pierpaolo Fontana and Michele Burrello and Andrea Trombettoni",
year = "2021",
month = nov,
day = "15",
doi = "10.1103/PhysRevB.104.195127",
language = "English",
volume = "104",
journal = "Physical Review B",
issn = "2469-9950",
publisher = "American Physical Society",
number = "19",

}

RIS

TY - JOUR

T1 - Topological van Hove singularities at phase transitions in Weyl metals

AU - Fontana, Pierpaolo

AU - Burrello, Michele

AU - Trombettoni, Andrea

PY - 2021/11/15

Y1 - 2021/11/15

N2 - We show that in three-dimensional (3D) topological metals, a subset of the van Hove singularities of the density of states sits exactly at the transitions between topological and trivial gapless phases. We may refer to these as topological van Hove singularities. By investigating two minimal models, we show that they originate from energy saddle points located between Weyl points with opposite chiralities, and we illustrate their topological nature through their magnetotransport properties in the ballistic regime. We exemplify the relation between van Hove singularities and topological phase transitions in Weyl systems by analyzing the 3D Hofstadter model, which offers a simple and interesting playground to consider different kinds of Weyl metals and to understand the features of their density of states. In this model, as a function of the magnetic flux, the occurrence of topological van Hove singularities can be explicitly checked.

AB - We show that in three-dimensional (3D) topological metals, a subset of the van Hove singularities of the density of states sits exactly at the transitions between topological and trivial gapless phases. We may refer to these as topological van Hove singularities. By investigating two minimal models, we show that they originate from energy saddle points located between Weyl points with opposite chiralities, and we illustrate their topological nature through their magnetotransport properties in the ballistic regime. We exemplify the relation between van Hove singularities and topological phase transitions in Weyl systems by analyzing the 3D Hofstadter model, which offers a simple and interesting playground to consider different kinds of Weyl metals and to understand the features of their density of states. In this model, as a function of the magnetic flux, the occurrence of topological van Hove singularities can be explicitly checked.

KW - SEMIMETAL

KW - FERMIONS

KW - STATES

KW - BAND

U2 - 10.1103/PhysRevB.104.195127

DO - 10.1103/PhysRevB.104.195127

M3 - Journal article

VL - 104

JO - Physical Review B

JF - Physical Review B

SN - 2469-9950

IS - 19

M1 - 195127

ER -

ID: 285453325