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I am a full-time PhD candidate at the School of Physics, I have earned my Masters of technology (M.Tech) degree from Indian Institute of Science (IISc), Bangalore with a focus on semiconductor technology and nano-fabrication and then have worked as senior application engineer at Applied Materials (process and diagnostic group, at Applied Materials Israel and acted as support engineer from AMAT at R&D TSMC Taiwan). My research interests lie in the areas of artificial quantum matter, quantum devices and GFETs.

±Ê°ù´ÇÂá±ð³¦³Ù:ÌýArtificial Quantum Matter

Supervised by:Ìý Prof. Alex Hamilton

Project description:Ìý

For natural crystals, the band structure and electronic properties are determined by the atomic constituents and the lattice structure. Engineered crystals, created by applying an artificially designed spatially periodic potential, such as a superlattice, to existing materials, have offered a powerful way to achieve desired electronic properties beyond the limitation of natural crystals. For example, Moiré superlattices, where different layers of two-dimensional (2D) materials are stacked and twisted to create a superlattice modulation potential, are currently attracting significant attention, as they provide an ideal platform for studying fundamental physics as well as promising future applications. Recent effects have resulted in several novel properties, like superconductivity, topological insulators, quantum interference, correlated insulators, etc. are discovered in moiré superlattices of graphene. However, the symmetry of the moiré lattice is constrained by the 2D crystals, and to date, only square, Kagome and triangular lattices have been created. Despite these existing studies, there still exists other combinations of lattice geometries that are yet to be explored Moreover, the strength of the modulation potential is set by the 2D material and is hard to change once the device has been fabricated.

This project will examine new approaches to making artificial quantum matter. Imposing a spatially periodic electric field via patterned metallic gates is a powerful technique to fabricate multiple quantum dots, thereby creating a superlattice modulation potential. This technique offers excellent control of the lattice constant, allows arbitrary lattice symmetry, and can be easily integrated into any existing materials system, such as conventional semiconductors or 2D van-der Waals materials. Advancements in lithography techniques and sensing instrument resolution have opened new avenues for high-precision tuning of the band structure and Fermi surfaces of these artificial crystals. The project will aim to build these artificial quantum materials and study them at ultra-low temperatures and in high magnetic fields to determine their electronic, magnetic and topological properties.