263 citations · 1k across the 22 of their papers we have counts for
11 papers · 1 filter
Topological piezomagnetic effect in two-dimensional Dirac quadrupole altermagnets
H. Radhakrishnan, B. Bell, C. Ortix +1
Altermagnets provide a natural platform for studying and exploiting piezomagnetism. In this paper, we introduce a class of insulating altermagnets in two dimensions (2D) referred t…
Layer dipole magnetoelectric polarizability of antiferromagnetic bilayers
H. Radhakrishnan, C. Ortix, J. W. F. Venderbos
In this paper we study magnetoelectric effects in two-dimensional magnetic bilayers and introduce the notion of a layer dipole magnetoelectric polarizability. This magnetoelectric…
Topological spin multipolization and linear magnetoelectric coupling in two-dimensional antiferromagnets
Jörn W. F. Venderbos, Paola Gentile, Carmine Ortix
In this paper we predict that the magnetoelectric response of two-dimensional (2D) antiferromagnets is determined by the topology of the ground state. This topological magnetoelect…
Translation symmetry-enriched toric code insulator
Pok Man Tam, Jörn W. F. Venderbos, Charles L. Kane
We introduce a two-dimensional electronic insulator that possesses a toric code topological order enriched by translation symmetry. This state can be realized from disordering a we…
Fractional Excitonic Insulator
Yichen Hu, Jörn W. F. Venderbos, C. L. Kane
We argue that a correlated fluid of electrons and holes can exhibit a fractional quantum Hall effect at zero magnetic field analogous to the Laughlin state at filling . We int…
Symmetry analysis of translational symmetry broken density waves: application to hexagonal lattices in two dimensions
J. W. F. Venderbos
In this work we introduce a symmetry classification for electronic density waves which break translational symmetry due to commensurate wave vector modulations. The symmetry classi…
Multi- hexagonal spin density waves and dynamically generated spin-orbit coupling: time-reversal invariant analog of the chiral spin density wave
J. W. F. Venderbos
We study hexagonal spin-channel ("triplet") density waves with commensurate -point propagation vectors. We first show that the three components of the singlet charge densi…
Switchable Quantum Anomalous Hall state in a strongly frustrated lattice magnet
Jörn W. F. Venderbos, Maria Daghofer, Jeroen van den Brink +1
We establish that the interplay of itinerant fermions with localized magnetic moments on a checkerboard lattice leads to magnetic flux-phases. For weak itineracy the flux-phase is…
Fractional quantum-Hall liquid spontaneously generated by strongly correlated t_2g electrons
Jörn W. F. Venderbos, Stefanos Kourtis, Jeroen van den Brink +1
For topologically nontrivial and very narrow bands, Coulomb repulsion between electrons has been predicted to give rise to a spontaneous fractional quantum-Hall (FQH) state in abse…
Narrowing of topological bands due to electronic orbital degrees of freedom
Jörn W. F. Venderbos, Maria Daghofer, Jeroen van den Brink
The Fractional Quantum Hall (FQH) effect has been predicted to occur in absence of magnetic fields and at high temperature in lattice systems that have flat bands with non-zero Che…
Macroscopic Degeneracy and Emergent Frustration in a Honeycomb Lattice Magnet
Jörn W. F. Venderbos, Maria Daghofer, Jeroen van den Brink +1
Using a hybrid method based on fermionic diagonalization and classical Monte Carlo, we investigate the interplay between itinerant and localized spins, with competing double- and s…