9 papers
Ordinary lattice defects as probes of topology
Aiden J. Mains, Jia-Xin Zhong, Yun Jing +1
In addition to topological lattice defects such as dislocations and disclinations, crystals are also accompanied by unavoidable ordinary defects, devoid of any non-trivial geometry…
Model non-Hermitian topological operators without skin effect: A general principle of construction
Daniel J. Salib, Sanjib Kumar Das, Bitan Roy
We propose a general principle of constructing non-Hermitian (NH) operators for insulating and gapless topological phases in any dimension () that over an extended NH parameter…
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…
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…
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…
From local spin nematicity to altermagnets: Footprints of band topology
Sanjib Kumar Das, Bitan Roy
Altermagnets are crystallographic rotational symmetry breaking spin-ordered states, possessing a net zero magnetization despite manifesting Kramer's non-degenerate bands. Here, we…