376 citations · 2.8k across the 80 of their papers we have counts for
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Anatomy of nanomagnetic switching at a 3D Topological Insulator PN junction
Hamed Vakili, Yunkun Xie, Samiran Ganguly +1
A P-N junction engineered within a Dirac cone system acts as a gate tunable angular filter based on Klein tunneling. For a 3D topological insulator with substantial bandgap, such a…
Biaxial Strain Modulated Valence Band Engineering in III-V Digital Alloys
Sheikh Z. Ahmed, Yaohua Tan, Jiyuan Zheng +2
Some III-V digital alloy avalanche photodiodes exhibit low excess noise. These alloys have low hole ionization coefficients due to presence of small 'minigaps', enhanced effective…
Positional stability of skyrmions in a racetrack memory with notched geometry
Md Golam Morshed, Hamed Vakili, Avik W. Ghosh
Magnetic skyrmions are chiral spin textures with attractive features, such as ultra-small size, solitonic nature, and easy mobility with small electrical currents that make them pr…
Atomistic transport modeling, design principles and empirical rules for Low Noise III-V Digital Alloy Avalanche Photodiodes
Sheikh Z. Ahmed, Yaohua Tan, Jiyuan Zheng +2
A series of III-V ternary and quarternary digital alloy avalanche photodiodes (APDs) have recently been seen to exhibit very low excess noise. Using band inversion of an environmen…
Characterization of band offsets in AlInAsSb alloys with varying Al composition
Jiyuan Zheng, Andrew H. Jones, Yaohua Tan +7
The unprecedented wide bandgap tunability (~1 eV) of AlInAsSb latticed-matched to GaSb enables the fabrication of photodetectors over a wide range from near…
Full band Monte Carlo simulation of AlInAsSb digital alloys
Jiyuan Zheng, Sheikh Z. Ahmed, Yuan Yuan +7
Avalanche photodiodes fabricated from AlInAsSb grown as a digital alloy exhibit low excess noise. In this paper, we investigate the band structure-related mechanisms that influence…