4 citations · 4 across the 2 of their papers we have counts for
7 papers
Moiré Flat Bands in Twisted Double Bilayer Graphene
Fatemeh Haddadi, QuanSheng Wu, Alex J. Kruchkov +1
We investigate twisted double bilayer graphene (TDBG), a four-layer system composed of two AB-stacked graphene bilayers rotated with respect to each other by a small angle. Our ab…
Non-Hermitian Boundary Modes
Dan S. Borgnia, Alex Jura Kruchkov, Robert-Jan Slager
We consider conditions for the existence of boundary modes in non-Hermitian systems with edges of arbitrary co-dimension. Through a universal formulation of formation criteria for…
Magic Angle Hierarchy in Twisted Graphene Multilayers
Eslam Khalaf, Alex J. Kruchkov, Grigory Tarnopolsky +1
When two monolayers of graphene are stacked with a small relative twist angle, the resulting band structure exhibits a remarkably flat pair of bands at a sequence of 'magic angles'…
Origin of Magic Angles in Twisted Bilayer Graphene
Grigory Tarnopolsky, Alex J. Kruchkov, Ashvin Vishwanath
Twisted Bilayer graphene (TBG) is known to feature isolated and relatively flat bands near charge neutrality, when tuned to special magic angles. However, different criteria for th…
Electric field-driven topological phase switching and skyrmion lattice metastability in magnetoelectric CuOSeO
J. S. White, I. Živković, A. J. Kruchkov +3
Due to their topological protection and nanometric size, magnetic skyrmions are anticipated to form components of new high-density memory technologies. In metallic systems skyrmion…
Direct control of the skyrmion phase stability by electric field in a magnetoelectric insulator
Alex J. Kruchkov, J. S. White, M. Bartowiak +3
Magnetic skyrmions are topologically protected spin-whirl quasiparticles currently considered as promising components for ultra-dense memory devices. In the bulk they form lattices…