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Magnetic-Field-Dependent Equilibration of Fractional Quantum Hall Edge Modes

Maiti, Tanmay; Agarwal, Pooja; Purkait, Suvankar; SREEJITH, G. J.; Das, Sourin; Biasiol, Giorgio; Sorba, Lucia; Karmakar, Biswajit (American Physical Society, 2020-08)

Fractional conductance is measured by partitioning a ν = 1 edge state using gate-tunable fractional quantum Hall (FQH) liquids of filling 1 / 3 or 2 / 3 for current injection and detection. We observe two sets of FQH ...
Temperature-dependent equilibration of spin orthogonal quantum Hall edge modes

Maiti, Tanmay; Agarwal, Pooja; Purkait, Suvankar; SREEJITH, G. J.; Das, Sourin; Biasiol, Giorgio; Sorba, Lucia; Karmakar, Biswajit (American Physical Society, 2021-08)

Conductance of the edge modes and conductance across the copropagating edge modes around the ν=4/3, 5/3, and 2 quantum Hall states are measured by individually exciting the modes. Temperature-dependent equilibration rates ...
Chemically Induced Surface Potential Modulation at Pd|Al2O3|Graphene Field Effect Transistors: Implications for Enhanced H2 Sensing

Agarwal, Pooja; Maiti, Tanmay; Purkait, Suvankar; ROY, DEEPAK; KABIR, MUKUL; Garg, Arti; Senapati, Dulal; Karmakar, Biswajit (American Chemical Society, 2022-08)

Surface potential is an important parameter for the development and optimization of high-performance charge/potential sensitive chemosensors. In this work, we demonstrate a technique of measuring surface potential modulation ...

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