Exploring Quantum Matter Through Transport Phenomena: Our group investigates diverse forms of quantum matter using transport phenomena as a powerful probe of the quantum nature of solids—from single-particle behavior to many-body physics. Over the years, we have developed state-of-the-art transport measurement techniques, including electrical conductance, thermal conductance, thermopower, and shot noise, performed at ultra-low temperatures (~10 mK) and high magnetic fields (~14 T).

By employing these techniques, we explore rich manifestations of quantum matter such as anyonic states (both Abelian and non-Abelian anyons like Majorana fermions), twisted quantum matter, and collective quantum states (e.g., spin-wave excitations/magnons) in solid-state devices. Our research primarily focuses on van der Waals heterostructures of graphene, twisted bilayer graphene, and other two-dimensional materials.

Saurabh’s paper on thermal conductance of fractional quantum Hall states in graphene accepted in PRL as an Editor’s suggestion. Congratulations to him.

Research Highlights

Coulomb Drag in dimensionally mismatched Van-der Waals Heterostructures

Coulomb drag is a non-invasive tool for probing the interlayer electron-electron interactions in bilayer systems. It is a transport phenomenon...
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Edge dynamics in graphene quantum Hall

Transport through edge-channels is responsible for conduction in quantum Hall (QH) phases. The equilibration among the edges dictates the electrical...
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Moire-Superlattice and Twistronics

The emergence of multiple Dirac cones in hexagonal boron nitride (hBN)−graphene heterostructures is particularly attractive because it offers potentially better...
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Opto-electronics in van der Waals heterostructures

Atomically thin p-n junction: The advent of various 2d-materials like graphene, transition metal di-chalcogenides (TMDs) and, the existence of well-established...
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Quantum capacitance

For a classical capacitor the capacitance is determined by only the geometry, where the electrons distribute themselves such a way...
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Quantum noise probing the charges and statistics

Fluctuation or noise may feel undesirable, but can contain intricate detail about a system not accessible by the average of...
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Thermal transport of Charge, Neutral mode and Majorana mode

When two-dimensional electron gas is cooled to millikelvin temperature regime and then subjected to a high magnetic field, well resolved...
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Unconventional Andreev Reflection at Graphene-Superconductor Junctions

Andreev reflection (AR) is the underlying phenomena that determines the quasiparticle dynamics at the junction of a superconductor with any...
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