Observation of ballistic upstream modes at fractional quantum Hall edges of graphene

R Kumar, SK Srivastav, C Spånslätt… - Nature …, 2022 - nature.com
The presence of “upstream” modes, moving against the direction of charge current flow in
the fractional quantum Hall (FQH) phases, is critical for the emergence of renormalized …

Evidence of compensated semimetal with electronic correlations at charge neutrality of twisted double bilayer graphene

A Ghosh, S Chakraborty, U Ghorai, AK Paul… - Communications …, 2023 - nature.com
Recently, magic-angle twisted bilayer graphene (MATBLG) has emerged with various
interaction-driven novel quantum phases at the commensurate fillings of the moiré …

Quantized conductance with nonzero shot noise as a signature of Andreev edge state

MR Sahu, AK Paul, J Sutradhar, K Watanabe… - Physical Review B, 2021 - APS
Electrical conductance measurements have a limited scope in identifying Andreev edge
states (AESs), which form the basis for realizing various topological excitations in quantum …

Electrically switchable tunneling across a graphene pn junction: evidence for canted antiferromagnetic phase in state

AK Paul, MR Sahu, K Watanabe, T Taniguchi… - arxiv preprint arxiv …, 2022 - arxiv.org
The ground state of a graphene sheet at charge neutrality in a perpendicular magnetic field
remains enigmatic, with various experiments supporting canted antiferromagnetic, bond …