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Topological Valley Currents in Gapped Dirac Materials
Yuri D. Lensky, Justin C. W. Song, Polnop Samutpraphoot +1
Gapped 2D Dirac materials, in which inversion symmetry is broken by a gap-opening perturbation, feature a unique valley transport regime. The system ground state hosts dissipationl…
Energy Flows in Graphene: Hot Carrier Dynamics and Cooling
Justin C. W. Song, Leonid S. Levitov
Long lifetimes of hot carriers can lead to qualitatively new types of responses in materials. The magnitude and time scales for these responses reflect the mechanisms governing ene…
Detecting Topological Currents in Graphene Superlattices
R. V. Gorbachev, J. C. W. Song, G. L. Yu +8
Topological materials may exhibit Hall-like currents flowing transversely to the applied electric field even in the absence of a magnetic field. In graphene superlattices, which ha…
Topological Bloch Bands in Graphene Superlattices
Justin C. W. Song, Polnop Samutpraphoot, Leonid S. Levitov
We outline an approach to endow a plain vanilla material with topological properties by creating topological bands in stacks of manifestly nontopological atomically thin materials.…
Ultra-narrow ionization resonances in a quantum dot under broadband excitation
Simon Gustavsson, Mark S. Rudner, Leonid S. Levitov +4
Semiconductor quantum dots driven by the broadband radiation fields of nearby quantum point contacts provide an exciting new setting for probing dynamics in driven quantum systems…