115 citations · 115 across the 1 of their papers we have counts for
5 papers
Composite Fermions and Broken Symmetries in Graphene
F. Amet, A. J. Bestwick, J. R. Williams +4
The electronic properties of graphene are described by a Dirac Hamiltonian with a fourfold symmetry of spin and valley. This symmetry may yield novel fractional quantum Hall (FQH)…
Universal Conductance Fluctuations in Electrolyte-Gated SrTiO3 Nanostructures
Sam W. Stanwyck, P. Gallagher, J. R. Williams +1
We report low-temperature magnetoconductance measurements of a patterned two-dimensional electron system (2DES) at the surface of strontium titanate, gated by an ionic liquid elect…
Insulating behavior at the neutrality point in dual-gated, single-layer graphene
F. Amet, J. R. Williams, K. Watanabe +2
The fate of the low-temperature conductance at the charge-neutrality (Dirac) point in a single sheet of graphene is investigated down to 20 mK. As the temperature is lowered, the p…
Tunneling Spectroscopy of Graphene-Boron Nitride Heterostructures
F. Amet, J. R. Williams, A. G. F. Garcia +4
We report on the fabrication and measurement of a graphene tunnel junction using hexagonal-boron nitride as a tunnel barrier between graphene and a metal gate. The tunneling behavi…
Electrolyte gate-controlled Kondo effect in SrTiO3
Menyoung Lee, J. R. Williams, Sipei Zhang +2
We report low-temperature, high-field magnetotransport measurements of SrTiO3 gated by an ionic gel electrolyte. A saturating resistance upturn and negative magnetoresistance that…