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Antiferromagnetic critical point on graphene's honeycomb lattice: A functional renormalization group approach

- L. Janssen, I. Herbut
- Physics
- 25 February 2014

Electrons on the half-filled honeycomb lattice are expected to undergo a direct continuous transition from the semimetallic into the antiferromagnetic insulating phase with increase of on-site… Expand

Compatible orders and fermion-induced emergent symmetry in Dirac systems

- L. Janssen, I. Herbut, M. Scherer
- Materials Science
- 29 November 2017

We study the quantum multicritical point in a (2+1)-dimensional Dirac system between the semimetallic phase and two ordered phases that are characterized by anticommuting mass terms with… Expand

Critical behavior of the (2+1)-dimensional Thirring model

- L. Janssen, H. Gies
- Physics
- 16 August 2012

We investigate chiral symmetry breaking in the (2+1)-dimensional Thirring model as a function of the coupling as well as the Dirac flavor number Nf with the aid of the functional renormalization… Expand

Deconfined criticality from the
QED3
-Gross-Neveu model at three loops

- Bernhard Ihrig, L. Janssen, L. Mihaila, M. Scherer
- PhysicsPhysical Review B
- 13 July 2018

The QED$_3$-Gross-Neveu model is a (2+1)-dimensional U(1) gauge theory involving Dirac fermions and a critical real scalar field. This theory has recently been argued to represent a dual description… Expand

Instanton constituents and fermionic zero modes in twisted CP n models

- Wieland Brendel, F. Bruckmann, L. Janssen, A. Wipf, Christian Wozar
- Physics
- 13 February 2009

Magnetization processes of zigzag states on the honeycomb lattice: Identifying spin models for α − RuCl 3 and Na 2 IrO 3

- L. Janssen, E. C. Andrade, M. Vojta
- Physics
- 16 June 2017

We study the field-induced magnetization processes of extended Heisenberg-Kitaev models on the honeycomb lattice, taking into account off-diagonal and longer-range exchange interactions, using a… Expand

Topological mott insulator in three-dimensional systems with quadratic band touching.

- I. Herbut, L. Janssen
- PhysicsPhysical review letters
- 23 April 2014

We argue that a three-dimensional electronic system with the Fermi level at the quadratic band touching point such as HgTe could be unstable with respect to the spontaneous formation of the… Expand

Heisenberg-Kitaev physics in magnetic fields.

- L. Janssen, M. Vojta
- PhysicsJournal of physics. Condensed matter : an…
- 6 March 2018

TLDR

Critical behavior of the QED 3 -Gross-Neveu model: Duality and deconfined criticality

- L. Janssen, Yin-chen He
- Physics
- 7 August 2017

We study the critical properties of the QED$_3$-Gross-Neveu model with $2N$ flavors of two-component Dirac fermions coupled to a massless scalar field and a U(1) gauge field. For $N=1$, this theory… Expand

On the Phase Structure of Many-Flavor QED${}_3$

- J. Braun, H. Gies, L. Janssen, D. Roscher
- Physics
- 4 April 2014

We analyze the many-flavor phase diagram of quantum electrodynamics (QED) in 2+1 (Euclidean) space-time dimensions. We compute the critical flavor number above which the theory is in the… Expand

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