Anindya Das

Quantized heat flow in moiré chern bands of bilayer graphene

Anindya Das, Santanu Samai, Debangan Sarkar, Abhijit Halder et autres

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Van Hove singularity-driven giant Nernst signal in twisted double bilayer graphene

Ujjal Roy, Monosij Roy, Unmesh Ghorai, Arkaprava Mukherjee et autres

Twisted graphene layers host van Hove singularities (vHSs), peaks in the electronic density of states, thought to drive exotic phases in moiré materials, but their effect on thermal transport has remained unclear. Here we show that vHSs in twisted double bilayer graphene …

Quantum oscillation spectroscopy of Fermi-surface topologies in tetralayer graphene

Abhijit Halder, Harsh Varshney, Snehamoyee Hazra, Santu Kumar Bera et autres

Quantum oscillations offer a direct probe of Fermi-surface topology and electronic degeneracy, yet disentangling both simultaneously across the Lifshitz transitions of multiband systems has remained an open experimental challenge. Here, we use Shubnikov-de Haas spectroscopy on a high-mobility, dual-gated Bernal-stacked tetralayer graphene …

Quantum oscillation spectroscopy of Fermi-surface topologies in tetralayer graphene

Abhijit Halder, Harsh Varshney, Snehamoyee Hazra, Santu Kumar Bera et autres

Quantum oscillations offer a direct probe of Fermi-surface topology and electronic degeneracy, yet disentangling both simultaneously across the Lifshitz transitions of multiband systems has remained an open experimental challenge. Here, we use Shubnikov-de Haas spectroscopy on a high-mobility, dual-gated Bernal-stacked tetralayer graphene …

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Van Hove singularity-driven giant Nernst signal in twisted double bilayer graphene

Ujjal Roy, Monosij Roy, Unmesh Ghorai, Arkaprava Mukherjee et autres

Twisted graphene layers host van Hove singularities (vHSs), peaks in the electronic density of states, thought to drive exotic phases in moiré materials, but their effect on thermal transport has remained unclear. Here we show that vHSs in twisted double bilayer graphene …

Quantized heat flow in moiré chern bands of bilayer graphene

Santanu Samai, Debangan Sarkar, Abhijit Halder, T. Taniguchi et autres

When electrons are subjected simultaneously to a magnetic field and a periodic potential, they form the fractal Hofstadter spectrum, whose topological gaps host quantum Hall and Chern insulating states with distinct Chern numbers. While electrical transport has established the topology of these …

Quantized heat flow in moiré chern bands of bilayer graphene

Santanu Samai, Debangan Sarkar, Abhijit Halder, Taniguchi T et autres

When electrons are subjected simultaneously to a magnetic field and a periodic potential, they form the fractal Hofstadter spectrum, whose topological gaps host quantum Hall and Chern insulating states with distinct Chern numbers. While electrical transport has established the topology of these …

Excitonic Landscape and Phonon-Mediated Recombination in Moiré-Engineered Twisted WSe 2 Bilayers

Memansa Thapa, A.W. Thomas, U. J. Jayalekshmi, Krishna Prasad Bera et autres

Twist-angle engineering in two-dimensional (2D) van der Waals (vdW) heterostructures unlocks an additional degree of freedom to tune optoelectronic properties and probe multibody quantum interactions. Here, we report light emission from the moiré superlattice of a twisted bilayer of tungsten diselenide (WSe …

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Moire-Engineered Excitonic Landscape and Phonon-Mediated Recombination in Twisted WSe2 Bilayers

Memansa Thapa, A.W. Thomas, Jayalekshmi U. J., Krishna Prasad Bera et autres

We report light emission from the moire superlattice of a twisted bilayer of tungsten diselenide (WSe2/WSe2) encapsulated in insulating hexagonal boron nitride (hBN). The low-temperature photoluminescence (PL) spectroscopy reveals signatures of moire-potential induced strong interlayer excitonic emission and phonon-assisted recombination, while the …

Half-integer thermal conductance in integer quantum Hall states

Ujjal Roy, Sourav Manna, Souvik Chakraborty, Ankur Das et autres

Considering a range of candidate quantum phases of matter, half-integer thermal conductance is believed to be an unambiguous evidence of non-Abelian states. It has been long known that such half-integer values arise due to the presence of Majorana edge modes, representing a …

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Half-integer thermal conductance in integer quantum Hall states

Ujjal Roy, Sourav Manna, Souvik Chakraborty, Kenji Watanabe et autres

Considering a range of candidate quantum phases of matter, half-integer thermal conductance is believed to be an unambiguous evidence of non-Abelian states. It has been long known that such half-integer values arise due to the presence of Majorana edge modes, representing a …

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Publisher Correction: Absence of heat flow in ν = 0 quantum Hall ferromagnet in bilayer graphene

Ravi Kumar, Saurabh Kumar Srivastav, Ujjal Roy, Ujjawal Singhal et autres

This article was originally published under standard Springer Nature license (© The Author(s), under exclusive licence to Springer Nature Limited). It is now available as an open-access paper under a Creative Commons Attribution 4.0 International license, © The Author(s). The error has …

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