4 papers
Emergent fractals in dirty topological crystals
Daniel J. Salib, Bitan Roy
Non-trivial geometry of electronic Bloch states gives rise to topological insulators which are robust against sufficiently weak randomness inevitably present in any quantum materia…
Observation of dislocation bound states and skin effects in non-Hermitian Chern insulators
Jia-Xin Zhong, Bitan Roy, Yun Jing
The confluence of non-Hermitian (NH) topology and crystal defects has culminated significant interest, yet its experimental exploration has been limited due to the challenges invol…
Non-unitary time dynamics of topological modes in open planar quantum systems
Saakshi Porwal, Bitan Roy
Nontrivial topological invariant of bulk electronic wavefunctions in two-dimensional quantum crystals leaves its footprints on the edge, dislocation, and corner modes. Here we inve…
Superconductivity in doped planar Dirac insulators: A renormalization group study
Sk Asrap Murshed, Sanjib Kumar Das, Bitan Roy
From a leading-order unbiased renormalization group analysis we here showcase the emergence of superconductivity (including the topological ones) from purely repulsive electron-ele…