8 papers
Magnetization signature of topological surface states in a non-symmorphic superconductor
Wenjun Kuang, Guillermo Lopez-Polin, Hyungjun Lee +10
Superconductors with nontrivial band structure topology represent a class of materials with unconventional and potentially useful properties. Recent years have seen much success in…
Long-range ballistic transport of Brown-Zak fermions in graphene superlattices
Julien Barrier, Piranavan Kumaravadivel, Roshan Krishna-Kumar +16
In quantizing magnetic fields, graphene superlattices exhibit a complex fractal spectrum often referred to as the Hofstadter butterfly. It can be viewed as a collection of Landau l…
Control of electron-electron interaction in graphene by proximity screening
M. Kim, S. G. Xu, A. I. Berdyugin +14
Electron-electron interactions play a critical role in many condensed matter phenomena, and it is tempting to find a way to control them by changing the interactions' strength. One…
Minibands in twisted bilayer graphene probed by magnetic focusing
A. I. Berdyugin, B. Tsim, P. Kumaravadivel +9
Magnetic fields force ballistic electrons injected from a narrow contact to move along skipping orbits and form caustics. This leads to pronounced resistance peaks at nearby voltag…
Giant oscillations in a triangular network of one-dimensional states in marginally twisted graphene
S. G. Xu, A. I. Berdyugin, P. Kumaravadivel +12
The electronic properties of graphene superlattices have attracted intense interest that was further stimulated by the recent observation of novel many-body states at "magic" angle…
Micromagnetometry of two-dimensional ferromagnets
M. Kim, P. Kumaravadivel, J. Birkbeck +14
The study of atomically thin ferromagnetic crystals has led to the discovery of unusual magnetic behaviour and provided insight into the magnetic properties of bulk materials. Howe…