3 papers
cond-mat.mes-hall2026
Optical spectroscopy of composite fermion edge states in the fractional quantum Hall effect
Maria Sebastian, Ashutosh Singh, Alexey Belyanin
We show that edge states in fractional quantum Hall effect samples can be selectively probed and excited with sub-terahertz optical spectroscopy. Using the composite fermion (CF) m…
cond-mat.mes-hall2025
Valley resolved optical spectroscopy and coherent excitation of quantum Hall edge states in graphene
Ashutosh Singh, Maria Sebastian, Mikhail Tokman +1
We show that chiral edge states in graphene under Quantum Hall effect conditions can be selectively probed and excited by terahertz or infrared radiation with single-quasiparticle…
cond-mat.mes-hall2024
Coherent optical control of quantum Hall edge states
Ashutosh Singh, Maria Sebastian, Mikhail Tokman +1
Current carrying chiral edge states in quantum Hall systems have fascinating properties that are usually studied by electron spectroscopy and interferometry. Here we demonstrate th…