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Modeling of a vertical tunneling graphene heterojunction field-effect transistor
S. Bala Kumar, Gyungseon Seol, Jing Guo
Vertical tunneling field-effect-transistor (FET) based on graphene heterojunctions with layers of hBN is simulated by self-consistent quantum transport simulations. It is found tha…
Quantum Size Effects on the Chemical Sensing Performance of Two-Dimensional Semiconductors
Junghyo Nah, S. Bala Kumar, Hui Fang +6
We investigate the role of quantum confinement on the performance of gas sensors based on two-dimensional InAs membranes. Pd-decorated InAs membranes configured as H2 sensors are s…
Chiral tunneling in trilayer graphene
S. Bala Kumar, Jing Guoa
We study the effect of chiral-tunneling in Bernal and Rombhohedral stacked trilayer-graphene (3LG). Based on the chirality of the electronic bands, at the K-point, (Rombhohedral) B…
Strain induced conductance modulation in graphene grain boundary
S. Bala Kumar, Jing Guo
Grain boundaries (GBs) are ubiquitous in polycrystalline graphene materials obtained by various growth methods. It has been shown previously that considerable electrical transport…
Observation of degenerate one-dimensional sub-bands in cylindrical InAs nanowires
Alexandra C. Ford, S. Bala Kumar, Rehan Kapadia +2
One-dimensional (1D) sub-bands in cylindrical InAs nanowires (NWs) are electrically mapped as a function of NW diameter in the range of 15-35 nm. At low temperatures, stepwise curr…