title: Measurement of the ν=1/3 fractional quantum hall energy gap in suspended graphene.
abstract: We report on magnetotransport measurements of multiterminal suspended graphene devices. Fully developed integer quantum Hall states appear in magnetic fields as low as 2 T. At higher fields the formation of longitudinal resistance minima and transverse resistance plateaus are seen corresponding to fractional quantum Hall states, most strongly for ν=1/3. By measuring the temperature dependence of these resistance minima, the energy gap for the 1/3 fractional state in graphene is determined to be at ∼20  K at 14 T.
authors.affiliation: Department of Physics, Columbia University, New York, New York 10027, USA.
authors.forename: Fereshte
authors.initials: F
authors.lastname: Ghahari
authors.forename: Yue
authors.initials: Y
authors.lastname: Zhao
authors.forename: Paul
authors.initials: P
authors.lastname: Cadden-Zimansky
authors.forename: Kirill
authors.initials: K
authors.lastname: Bolotin
authors.forename: Philip
authors.initials: P
authors.lastname: Kim