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Imaging the Flow of Holes from a Collimating Contact in Graphene
Sagar Bhandari, Mary Kreidel, Alexander Kelser +5
A beam of holes formed in graphene by a collimating contact is imaged using a liquid-He cooled scanning probe microscope (SPM). The mean free path of holes is greater than the devi…
Electrically controlled emission from triplet charged excitons in atomically thin heterostructures
Andrew Y. Joe, Luis A. Jauregui, Kateryna Pistunova +15
Excitons are composite bosons that can feature spin singlet and triplet states. In usual semiconductors, without an additional spin-flip mechanism, triplet excitons are extremely i…
High resolution imaging of reconstructed domains and moire patterns in functional van der Waals heterostructure devices
Andrey Sushko, Kristiaan De Greve, Trond I. Andersen +8
The optical and electronic properties of van der Waals (vdW) heterostructures depend strongly on the atomic stacking order of the constituent layers. This is exemplified by periodi…
Moiré Excitons Correlated with Superlattice Structure in Twisted WSe/WSe Homobilayers
Trond I. Andersen, Giovanni Scuri, Andrey Sushko +11
Moiré superlattices in twisted van der Waals materials constitute a promising platform for engineering electronic and optical properties. However, a major obstacle to fully underst…
Thermoelectric power of Sachdev-Ye-Kitaev islands: Probing Bekenstein-Hawking entropy in quantum matter experiments
Alexander Kruchkov, Aavishkar Patel, Philip Kim +1
The Sachdev-Ye-Kitaev (SYK) model describes electrons with random and all-to-all interactions, and realizes a many-body state without quasiparticle excitations, and a non-vanishing…
Guiding Dirac fermions in graphene with a carbon nanotube
Austin Cheng, Takashi Taniguchi, Kenji Watanabe +2
Relativistic massless charged particles in a two-dimensional conductor can be guided by a one-dimensional electrostatic potential, in an analogous manner to light guided by an opti…