1.8k citations · 3.4k across the 9 of their papers we have counts for
9 papers
Electron transport in bilayer graphene nano constrictions patterned using AFM nanolithography
Robert W. Rienstra, Nishat Sultana, En-Min Shih +7
Here we report on low temperature transport measurements of encapsulated bilayer graphene nano constrictions fabricated employing electrode-free AFM-based local anodic oxidation (L…
Edge Channels of Broken-Symmetry Quantum Hall States in Graphene probed by Atomic Force Microscopy
Sungmin Kim, Johannes Schwenk, Daniel Walkup +12
The quantum Hall (QH) effect, a topologically non-trivial quantum phase, expanded and brought into focus the concept of topological order in physics. The topologically protected qu…
Interaction Driven Quantum Hall Wedding cake-like Structures in Graphene Quantum Dots
Christopher Gutiérrez, Daniel Walkup, Fereshte Ghahari +7
Quantum-relativistic matter is ubiquitous in nature; however it is notoriously difficult to probe. The ease with which external electric and magnetic fields can be introduced in gr…
An On/Off Berry Phase Switch in Circular Graphene Resonators
Fereshte Ghahari, Daniel Walkup, Christopher Gutiérrez +10
The phase of a quantum state may not return to its original value after the system's parameters cycle around a closed path; instead, the wavefunction may acquire a measurable phase…
Enhanced Thermoelectric Power in Graphene: Violation of the Mott Relation By Inelastic Scattering
Fereshte Ghahari, Hong-Yi Xie, Takashi Taniguchi +3
We report the enhancement of the thermoelectric power (TEP) in graphene with extremely low disorder. At high temperature we observe that the TEP is substantially larger than the pr…
Hofstadter's butterfly in moire superlattices: A fractal quantum Hall effect
C. R. Dean, L. Wang, P. Maher +12
Electrons moving through a spatially periodic lattice potential develop a quantized energy spectrum consisting of discrete Bloch bands. In two dimensions, electrons moving through…
Magnetoresistance measurements of Graphene at the Charge Neutrality Point
Yue Zhao, Paul Cadden-Zimansky, Fereshte Ghahari +1
We report on transport measurements of the insulating state that forms at the charge neutrality point of graphene in a magnetic field. Using both conventional two-terminal measurem…
Measurement of the ν= 1/3 fractional quantum Hall energy gap in suspended graphene
Fereshte Ghahari, Yue Zhao, Paul Cadden-Zimansky +2
We report on magnetotransport measurements of multi-terminal suspended graphene devices. Fully developed integer quantum Hall states appear in magnetic fields as low as 2 T. At hig…
Observation of the Fractional Quantum Hall Effect in Graphene
Kirill I. Bolotin, Fereshte Ghahari, Michael D. Shulman +2
When electrons are confined in two dimensions and subjected to strong magnetic fields, the Coulomb interactions between them become dominant and can lead to novel states of matter…