226 citations · 729 across the 43 of their papers we have counts for
17 papers · 1 filter
Topological random alloy
Subrata Pachhal, Aziz Hasan, Adhip Agarwala
Topological phases of matter are often realized in crystalline materials. To extend their understanding beyond perfect stoichiometry, we introduce a minimal model of a topological…
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…
Topologically switchable transport in a bundled cable of wires
Nirnoy Basak, Ritajit Kundu, Basudeb Mondal +1
Advances in the next generation of mesoscopic electronics require an understanding of topological phases in inhomogeneous media and the principles that govern them. Motivated by th…
Diffusive metal in a percolating Chern insulator
Subrata Pachhal, Naba P. Nayak, Soumya Bera +1
Two-dimensional non-interacting fermions without any anti-unitary symmetries generically get Anderson localized in the presence of disorder. In contrast, topological superconductor…
Symmetry-protected topological wire in a topological vacuum
Subrata Pachhal, Adhip Agarwala
Symmetry-protected topological phases host gapless modes at their boundary with a featureless environment of the same dimension or a trivial vacuum. In this study, we explore their…
Tunable Topological Phases in Quantum Kirigamis
Rahul Singh, Adhip Agarwala
Advances in engineering mesoscopic quantum devices have led to new material platforms where electronic transport can be achieved on foldable structures. In this respect, we study q…
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…
Chiral metals and entrapped insulators in a one-dimensional topological non-Hermitian system
Ayan Banerjee, Suraj S. Hegde, Adhip Agarwala +1
In this work we study many-body 'steady states' that arise in the non-Hermitian generalisation of the non-interacting Su-Schrieffer-Heeger model at a finite density of fermions. We…
Interaction driven giant thermopower in magic-angle twisted bilayer graphene
Arup Kumar Paul, Ayan Ghosh, Souvik Chakraborty +9
Magic-angle twisted bilayer graphene (MtBLG) has proven to be an extremely promising new platform to realize and study a host of emergent quantum phases arising from the strong cor…
Exploring ideas in topological quantum phenomena: A journey through the SSH model
Anantha Hegde, Adarsh Kumar, Adhip Agarwala +1
Geared as an invitation for undergraduates, beginning graduate students, we present a pedagogical introduction to one-dimensional topological phases -- in particular the Su-Schrief…
Higher-order topological insulators in amorphous solids
Adhip Agarwala, Vladimir Juricic, Bitan Roy
We identify the possibility of realizing higher order topological (HOT) phases in noncrystalline or amorphous materials. Starting from two and three dimensional crystalline HOT ins…
Effects of local periodic driving on transport and generation of bound states
Adhip Agarwala, Diptiman Sen
We periodically kick a local region in a one-dimensional lattice and demonstrate, by studying wave packet dynamics, that the strength and the time period of the kicking can be used…
Killing the Hofstadter butterfly, one bond at a time
Adhip Agarwala
Electronic bands in a square lattice when subjected to a perpendicular magnetic field form the Hofstadter butterfly pattern. We study the evolution of this pattern as a function of…
Topological Insulators in Random Lattices
Adhip Agarwala, Vijay B. Shenoy
Our understanding of topological insulators is based on an underlying crystalline lattice where the local electronic degrees of freedom at different sites hybridize with each other…
Effects of interactions on periodically driven dynamically localized systems
Adhip Agarwala, Diptiman Sen
It is known that there are lattice models in which non-interacting particles get dynamically localized when periodic -function kicks are applied with a particular strength. We u…
The tenfold way redux: Fermionic systems with -body interactions
Adhip Agarwala, Arijit Haldar, Vijay B. Shenoy
We provide a systematic treatment of the tenfold way of classifying fermionic systems that naturally allows for the study of those with arbitrary -body interactions. We identify…
Effects of periodic kicking on dispersion and wave packet dynamics in graphene
Adhip Agarwala, Utso Bhattacharya, Amit Dutta +1
We study the effects of -function periodic kicks on the Floquet energy-momentum dispersion in graphene. We find that a rich variety of dispersions can appear depending on the pa…