13 citations · 41 across the 13 of their papers we have counts for
13 papers
Quantum oscillation spectroscopy of Fermi-surface topologies in tetralayer graphene
Abhijit Halder, Harsh Varshney, Snehamoyee Hazra +7
Quantum oscillations offer a direct probe of Fermi-surface topology and electronic degeneracy, yet disentangling both simultaneously across the Lifshitz transitions of multiband sy…
Van Hove singularity-driven giant Nernst signal in twisted double bilayer graphene
Ujjal Roy, Monosij Roy, Unmesh Ghorai +8
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 therma…
Quantized heat flow in moiré chern bands of bilayer graphene
Santanu Samai, Debangan Sarkar, Abhijit Halder +5
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 Ch…
Moire-Engineered Excitonic Landscape and Phonon-Mediated Recombination in Twisted WSe2 Bilayers
Memansa Thapa, Aksa Thomas, Jayalekshmi U. J. +7
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-tempe…
Half-integer thermal conductance in the absence of Majorana mode
Ujjal Roy, Sourav Manna, Souvik Chakraborty +6
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 ha…
Anomalies in G and 2D Raman Modes of Twisted Bilayer Graphene Near the Magic Angle
Darshit Solanki, Kenji Watanabe, Takashi Taniguchi +2
The role of twist angle () in tailoring the physical properties of heterostructures is emerging as a new paradigm in two-dimensional materials. The influence of flat electroni…
Resistance hysteresis in twisted bilayer graphene: Intrinsic versus extrinsic effects
Ranit Dutta, Ayan Ghosh, Kenji Watanabe +2
Hysteresis in resistance under magnetic field sweeps is a key signature for identifying magnetism in twisted bilayer graphene and similar systems. However, such sweeps can induce e…
Absence of heat flow in ν = 0 quantum Hall ferromagnet in bilayer graphene
Ravi Kumar, Saurabh Kumar Srivastav, Ujjal Roy +6
The charge neutrality point of bilayer graphene, denoted as ν = 0 state, manifests competing phases marked by spontaneously broken isospin (spin/valley/layer) symmetries under exte…
Quantized heat flow in graphene quantum Hall phases: Probing the topological order
Saurabh Kumar Srivastav, Anindya Das
Topological quantum numbers are often used to characterise the topological order of phase having protected gapless edge modes when the system is kept in a space with the boundary.…
Thermopower probing emergent local moments in magic-angle twisted bilayer graphene
Ayan Ghosh, Souvik Chakraborty, Ranit Dutta +7
Recent experiments on magic-angle twisted bilayer graphene (MATBLG) have revealed the formation of flatbands, suggesting that correlation effects are likely to dominate in this sys…
Electric field tunable superconductivity with competing orders in twisted bilayer graphene near magic-angle
Ranit Dutta, Ayan Ghosh, Shinjan Mandal +6
Superconductivity (SC) in twisted bilayer graphene (tBLG) has been explored by varying carrier concentrations, twist angles, and screening strength, with the aim of uncovering its…
Electric field tunable edge transport in Bernal stacked trilayer graphene
Saurabh Kumar Srivastav, Adithi Udupa, K. Watanabe +3
This letter presents a non-local study on the electric field tunable edge transport in an hBN-encapsulated dual-gated Bernal stacked (ABA) trilayer graphene across various displace…
Electrical noise spectroscopy of magnons in a quantum Hall ferromagnet
Ravi Kumar, Saurabh Kumar Srivastav, Ujjal Roy +7
Collective spin-wave excitations-magnons-in a quantum Hall ferromagnet are promising quasi-particles for next-generation spintronics devices, including platforms for information tr…