Research Interest

My research area is nanoelectronics. More specifically, I do electronic transport measurements of two-dimensional materials such as graphene and explore the fundamental aspect of physics.

Monolayer graphene is a one-atom-thick sheet of carbon atoms arranged in a hexagonal lattice with many interesting properties. With the unique band structure governed by the non-trivial topology of the Hamiltonian, this has been an interesting platform for studying many quantum phenomena e.g., quantum Hall effect, Klein tunneling, etc. Multilayer graphene systems such as bilayer and trilayer graphene have also been used as unique test beds for understanding fundamental physics. At the initial stage of my Ph.D. I took part in a project where we explore an interesting aspect of ABA trilayer graphene. [1]

Currently, my major focus is on experimenting with twisted graphene systems. Recently, 2D materials-based superlattices have emerged as a promising platform to modulate band structure and its symmetries. In particular, it has been demonstrated that when two copies of monolayer graphene are stacked with a ‘magic’ angle twist between them, low-energy flat bands appear. The flat bands give birth to a plethora of electronic interaction governed phenomena like superconductivity, ferromagnetism, etc. We extensively study a similar system named twisted double bilayer graphene (TDBG), where two copies of bilayer graphene are put on top of each other with a relative twist between them. We fabricate many dual gated devices of small-angle TDBG and do electron transport measurements up to cryogenic temperature (as low as 10 mK) to explore several aspects of this system. In particular, I mention two such works – one is published in Phys. Rev. B. [2] and the other one in Nat. Comm. [3].