109 citations · 162 across the 14 of their papers we have counts for
14 papers
Topological signatures in the quench dynamics of periodically driven quantum systems
Ashutosh Dubey, Hironmoy Pratihar, Diptiman Sen +1
We study the quench dynamics of graphene, without and with a staggered mass, following the sudden switch-on of circularly polarized light where coupling to a fermionic bath is also…
New frontiers in quantum science and technology using van der Waals Josephson junctions
Joydip Sarkar, Ayshi Mukherjee, Amit Basu +3
Over the last decade, the development of Josephson devices based on van der Waals (vdW) materials has advanced rapidly, representing a paradigm shift driven by the advent of 2D mat…
Emergent topological phase from a one-dimensional network of defects
Rahul Singh, Ritajit Kundu, Arijit Kundu +1
Symmetry-protected topological phases of matter, characterized by non-trivial band topology, are spectrally gapped and show non-trivial boundary phenomena. Here, we show that scatt…
Umklapp-Enhanced Interlayer Valley Drag in Moiré Bilayers
Ritajit Kundu, Mandar M. Deshmukh, Herbert A. Fertig +1
Van der Waals materials may be combined to form moiré patterns that are effectively crystal lattices. These systems are unique in that their in-plane unit cell sizes may be orders…
Quantum interference in a twisted high-Tc SQUID senses emergent interfacial order
Amit Basu, Samrat Ash, Ritajit Kundu +12
Engineering artificial systems by twisting and stacking van der Waals materials has proven to be an excellent platform for exploring emergent quantum phenomena that can be signific…
Index-theoretic route to the subgap Andreev bands and topological response in Josephson junctions
Sinchan Ghosh, Srinjoy Ghosh, Arijit Kundu +1
We demonstrate that the subgap Andreev bound states in a transparent Josephson junction, comprising of either chiral or non-chiral superconductors, can be viewed as a consequence o…
Emergent Carroll symmetry at phase separation in one-dimensional lattice systems
Sourav Biswas, Ashutosh Dubey, Saikat Mondal +3
Asymptotic behavior of generic Tomonaga-Luttinger liquid in the vicinity of phase-separated regions is known to produce an instability where well-known relativistic Conformal Field…
Superconducting magic-angle twisted trilayer graphene hosts competing magnetic order and moiré inhomogeneities
Ayshi Mukherjee, Surat Layek, Subhajit Sinha +13
The microscopic mechanism of superconductivity in the magic-angle twisted graphene family, including magic-angle twisted trilayer graphene (MATTG), is poorly understood. Properties…
Time-resolved ARPES and optical transport properties of irradiated twisted bilayer graphene in steady-state
Ashutosh Dubey, Ritajit Kundu, Arijit Kundu
We theoretically investigate the trARPES spectrum and optical Hall conductivity in periodically driven twisted bilayer graphene, considering both steady-state and "projected" occup…
Josephson junction of minimally twisted bilayer graphene
Ritajit Kundu, Arijit Kundu
We theoretically investigate the transport properties of Josephson junctions composed of superconductor/minimally twisted bilayer graphene/superconductor structures. In the presenc…
Fermi-arcs mediated transport in surface Josephson junctions of Weyl semimetal
Rekha Kumari, Dibya Kanti Mukherjee, Arijit Kundu
This study presents Fermi-arcs mediated transport in a Weyl semimetal thin slab, interfacing two -wave superconductors. We present detailed study with both time-reversal and inv…
Valley filtering and valley valves in irradiated pristine graphene
Rekha Kumari, Gopal Dixit, Arijit Kundu
We theoretically study valley-filtering in pristine graphene irradiated by bicircular counter-rotating laser drive. The dynamical symmetry of the graphene and laser drive disrupts…
Anomalous Josephson current, incipient time-reversal symmetry breaking, and Majorana bound states in interacting multi-level dots
A. Brunetti, A. Zazunov, A. Kundu +1
We study the combined effects of spin-orbit interaction, magnetic field, and Coulomb charging on the Josephson current-phase relation, I(φ), for a multi-level quantum dot tunnel-co…
Energy spectrum and broken spin-surface locking in topological insulator quantum dots
A. Kundu, A. Zazunov, A. Levy Yeyati +2
We consider the energy spectrum and the spin-parity structure of the eigenstates for a quantum dot made of a strong topological insulator. Using the effective low-energy theory in…