61 citations · 121 across the 11 of their papers we have counts for
8 papers · 1 filter
Anomalous Random Telegraphy Signal in Suspended Graphene with Oxygen Adsorption
Alexandro de Moraes Nogueira, Afsal Kareekunnan, Masashi Akabori +2
Graphene is a promising material for sensing applications because of its large specific surface area and low noise. In many applications, graphene will inevitably be in contact wit…
Berry curvature induced valley Hall effect in non-encapsulated hBN/Bilayer graphene heterostructure aligned with near-zero twist angle
Teppei Shintaku, Afsal Kareekunnan, Masashi Akabori +3
Valley Hall effect has been observed in asymmetric single-layer and bilayer graphene systems. In single-layer graphene systems, asymmetry is introduced by aligning graphene with he…
Vector Electrometry in a Wide-Gap Semiconductor Device Using a Spin Ensemble Quantum Sensor
Yang, Bang, Takuya Murooka +8
Nitrogen-vacancy (NV) centers in diamond work as a quantum electrometer. Using an ensemble state of NV centers, we propose vector electrometry and demonstrate measurements in a dia…
An In-situ Annealing effect of Graphene-Graphene Interlayer Conduction
Jothiramalingam Kulothungan, Manoharan Muruganathan, Hiroshi Mizuta
An interlayer distance modulation in twisted bilayer graphene is reported. This is achieved by an in-situ annealing technique. The transformation of systematic vacuum and hydrogen…
Fabry-Pérot resonances and a crossover to the quantum Hall regime in ballistic graphene quantum point contacts
Nurul Fariha Ahmad, Katsuyoshi Komatsu, Takuya Iwasaki +8
We report on the observation of quantum transport and interference in a graphene device that is attached with a pair of split gates to form an electrostatically-defined quantum poi…
Observation of Electrically Tunable van der Waals Interaction in Graphene-Molecule Complex
Manoharan Muruganathan, Jian Sun, Tomonori Imamura +1
van der Waals (vdW) interaction plays a fundamental role in the surface-molecules related phenomena. Tuning of the correlated charge fluctuation in the vdW complex is a plausible w…
Defect-induced Fermi level pinning and suppression of ambipolar behaviour in graphene
Zakaria Moktadir, Shuojin Hang, Hiroshi Mizuta
We report on systematic study of electronic transport in low-biased, disordered graphene nanowires. We reveal the emergence of unipolar transport as the defect concentration increa…
A U-shaped bilayer graphene channel transistor with a very high Ion/Ioff ratio
Z. Moktadir, S. A. Boden, A. Ghiass +2
A novel graphene transistor architecture is reported. The transistor has a U-shape geometry and was fabricated using a gallium focused ion beam (FIB). The channel conductance was t…